AutoCAD MEP 2012 Is Live

Go to your Autodesk Subscription site to download it now.

See the WHAT'S NEW IN AUTOCAD MEP 2012 video from Autodesk here.

AutoCAD MEP 2010 Update 2

Download it here

General Updates to AutoCAD MEP

The following defects have been fixed in AutoCAD MEP 2010 Update 2:

BDH Import
Update 2

• Radiator Import may lead to crash during when updating existing drawings.

Device
Update 1

• Device modify via grip edit doesn't move or maintain its orientation as expected.
• The Add Automatic Property for a Device was not retrieving the Load Category or Number of Poles.

Update 2

• Opening drawings from previous releases may lead to crash.
• When Rotating Devices with Update 1 installed, the Device annotation is not rotating relative to the offset specified in the block.
• Layer Key Override - Devices with an assigned System Definition that contains a Layer Key Override are appending the initial overrides in the Layer Key Override dialog.

Display
Update 1

• Haloed or hidden appearance for Plumbing Lines, Schematic lines and Wires do not display correctly.

Duct
Update 1

• Duct Flanges are displayed incorrectly after moving a duct using grips.
• Velocity in Duct Modify does not match the Velocity in the Properties Palette.
• Add Selected does not work correctly when duct height is greater than duct width.
• Takeoff for branch is not sized correctly when duct height is greater than duct width.
• Top and Bottom Elevation are incorrect in tooltip when duct height is greater than duct width.

Update 2

• Duct Takeoffs may move or become disconnected during Regen Model. Elbow may change elevation when changing parameters values.

Electrical
Update 1

• A crash may occur when closing a drawing with an EPD file that has a relative path.
• A crash may occur when converting multiple blocks to Devices.
• Wire will only connect to one connector on some scaled devices.

Update 2

• Duplicate circuits may be created when copying devices between two drawings.
• Circuit Manager appears to hang in drawings with multiple tabs.
• Wire sizes may not appear in the first time Circuit Manager is activated.
• EPD Relative Pathing may not work on mapped networked drives.
• Exiting AutoCAD MEP with Circuit Manager open may lead to crash.
• Using Block Editor in a Panel Schedule drawing may lead to Circuits losing there name in the Schedule.

Info Center
Update 2

• Balloon notifications in Info Center may be blank when Windows 7 theme is set to classic

Performance
Update 2

• Compass repeatly sets Elevation value when Project Navigator is active.
• Opening drawings with large Xreferences may cause AutoCAD MEP to stop responding.
• Closing drawings may not release memory.

Multi-View Parts
Update 1

• Some linework is missing from certain MvParts.
• Radiator insertion fails, using the window option, if the radiator width or length is located in a basic table.
• Radiator Import does not set property data properly.
• Radiator valves are not aligned to the radiator when inserted using the plus grip.

Pipe
Update 1

• The formula for percentage slope by angle is incorrect. Fixing this means that an existing tool in which a specific number for percentage is stored will produce a different slope due to the new calculation.
• Pipe layouts with Very low slope cannot be created correctly.
• The Parallel Pipe command places new pipes on the wrong layer when systems use different layers.
• Some Pipe created in previous versions of AutoCAD MEP snaps to fittings when opened.

Update 2

• Some fittings accessed thru Runtime catalog may not appear in Routing Preferences.
• Some fittings may not appear correct when accessed thru a runtime catalog.

Plumbing
Update 2

• Plumbing Line overlapping with Plumbing fitting may lead to crash.
• Changing a Fitting Style on the Properties Palette may lead to the command line style control to not work.
• Selecting a Plumbing Line on Windows 7 operating system may lead to crash.

Schedules
Update 2

• Wrong area is calculated in BOM table with OE-NORM if length smaller than 400 and size constant in DACH profile.

Schematics
Update 2

• When filleting two schematic lines with schematic symbols, the schematic line end may snap to a schematic symbol.
• When drawing a short schematic line segment from a schematic symbol the schematic line may snap to the schematic symbol.

Sections
Update 2

• Creating a 2D section using large selection set on a 32 bit operating system may lead to crash.

Tool Palette
Update 2

• Dragging a Tool from Content Browser onto a Tool Palette may lead to script error.

Miscellaneous
Update 1

• CollisionDetection does not work as expected.
• "Copy to Clipboard failed" dialog will appear when copying an object that has been copy/pasted from another drawing.
• A fatal error will occur when creating an elbow with multiple segments.

Update 2

• Reloading Xrefs may lead to crash.

General Updates to AutoCAD Architecture

The following AutoCAD Architecture defects have been fixed:

AEC Dimensions
Update 1

• Multiple overlapping windows may lead to incorrect dimensions.

API
Update 1

• AutoCAD Architecture might crash when trying to define a Display Theme style using .NET API.

Doors/Windows/Openings
Update 2

• When a custom block is applied to a door, window, or door-window assembly, the block will be visible even if it is not within the cut plane range.
• Sometimes, you cannot insert an opening in a wall in a certain cleanup group.

Drawing Management
Update 2

• AutoCAD Architecture may crash when you repath certain projects with no drawings open.
• Renaming items in the Project Navigator, and repathing the project may cause AutoCAD Architecture to crash.

Export to AutoCAD
Update 2

• Export to Autocad sometimes causes AutoCAD Architecture to crash.

External References
Update 1

• Openings in external references with negative Z value are placed at an incorrect position.

Update 2

• When you execute UNDO command after binding an external reference, AutoCAD Architecture may become unresponsive.
• AutoCAD Architecture may crash if you unload an external reference, attach it again, and then execute an UNDO.

GBXML
Update 2

• Duplicate openings are created in gbXML output when walls are slightly off from being perpendicular to each other.

General UI
Update 2

• Checkboxes are not displayed correctly on the Object Snap tab of the Drafting Settings dialog on Windows 7.

IFC
Update 1

• Slabs may have the wrong elevation when imported from an IFC file due to an incorrect thickness offset.
• Exporting a drawing to IFC may create incorrect IFC GUIDs for AEC objects.
• Importing IFC files that contain certain material settings may crash.
• Space exported to IFC have the IFC type of IFCTYPEOBJECT instead of IFCSPACETYPE.

Update 2

• When you import an IFC file, containing a space that uses a negative value for extrusion, the extrusion is in the wrong direction.
• Importing an IFC file fails if it contains a 3D vector for True North direction.

Layers
Update 1

• The "New layer from Standard" button doesn't work in localized versions.
• Layer description fields are not automatically populated in all cases.

Update 2

• When the Layer Properties Manager is open, opening a drawing sometimes causes AutoCAD Architecture to crash.

Multiview Blocks
Update 2

• When AutoCAD Architecture and Civil 3D are installed side by side, AutoCAD Architecture crashes on executing MVBLOCKADD command.

Performance
Update 1

• Response is very slow when using Dynamic UCS and objects are Isolated.

Update 2

• Sometimes, it takes a long time to complete an UNDO after a COPY.

Property Palette
Update 1

• Changing an entry to one that is the first characters of the previous entry will not work in some fields.

Save
Update 2

• When you save a drawing to a previous version, sometimes, you are not warned about possible data loss.

Schedules
Update 1

• Schedules are not sorted as expected when values are a combination of numeric and alphabetic characters.

Update 2

• Sometimes, schedule table data is not rounded off as specificed in the property data format.

Sections
Update 1

• Some objects imported from Inventor display as points in 2D Sections.

Update 2

• When a window or door window assembly is sectioned, some linework may be missing in the section.

Structural Members
Update 1

• Custom block based on 3D Solids using Boolean operations are always placed at the start point.

Spaces
Update 2

• AutoCAD Architecture may crash when a spaced update is triggered for a large number of spaces within an external reference.

Wall Objects
Update 1

• AutoCAD Architecture might hang when opening certain drawings that contain modified Wall Endcaps.
• Window openings may not be created due to Wall Plan Modifiers.
• Using Refedit on a block containing Wall Object may cause a crash.

Update 2

• When working on a project located on a slow network, the wall and curtain wall tools are slow to respond.
• Some walls in an external reference display solution tips when the units of the host drawing are different from that of the external reference.
• AutoCAD Architecture will crash when you delete a component of a wall which is on a locked layer.

Subscription Benefits

• With this update, if you are a subscription customer, a balloon notification periodically displays, letting you know how much time remains before your subscription expires. This notification will only display three times. You can access selected subscription benefits more quickly, without having to log on to the Subscription Center.

Online Renewal

• If you meet the online renewal program rules, you can renew your AutoCAD MEP subscription online. If you have already renewed your subscription, or are not a subscription customer, these options are not available.
• In InfoCenter, follow the directions in the alert message that displays.
• In InfoCenter, click the Subscription Center button. Under Benefits Center, click Renew Online and follow the directions that display.

eLearning

• In InfoCenter, click the Subscription Center button. Under Benefits Center, click View eLearning Catalog. You will be prompted to sign-in to the Subscription Center.

Search

• You can access some subscription-only learning and technical support without logging onto the Subscription Center. This includes some eLearning lessons.

New Advantage Packs

• When a new Advantage Pack becomes available, a balloon notification and menu option displays. To review and download the Advantage Pack, click the balloon notification or menu option. You must have permission to begin the download. Contract managers and software coordinators can control access to Advantage Packs from Subscription Center > Set Access from Product. Instructions for setting access permissions are provided to contract managers and software coordinators prior to Advantage Pack releases.

General Updates

The following AutoCAD defects have been fixed:

2D Drawing
Update 1

• If the PLINETYPE system variable is set to 0, STRETCH does not work as expected on arc segments of polylines.
• When the PLINETYPE system variable is set to 0, the closing point of a polyline with segments of different widths do not display correctly.
• If you use the JOIN command on splines, a duplicate control point is inserted.
• When you use the JOIN command on multiple polylines, AutoCAD may become unstable.

Update 2

• When drawing a closed heavy weight polyline with different width for each segment, the polyline cannot be closed properly.

3D Modeling
Update 1

• When you open a drawing that contains solids, some solids display briefly and then disappear.
• If a grip on a mesh face, edge, or vertex is highlighted and you use the ViewCube, AutoCAD may become unstable.

3D Navigation Tools
Update 1

• When you use the 3DORBIT command, you cannot orbit correctly. You can only orbit around a single pivot point and you cannot orbit around a specific object in a large group of objects.

Update 2

• AutoCAD may become unstable while dragging the cube and releasing the cursor at the top of the canvas.

Action Recorder
Update 1

• An Action Recorder macro created in AutoCAD 2009 may fail to run in AutoCAD 2010.

Annotation Scaling
Update 1

• When there are xrefs in a drawing, changing annotation scales takes a long time.
• When an annotative style multiline text (mtext) is rotated or surrounded by a hatch, the boundary box does not display correctly.

API
Update 2

• Exploding a block using "NetExplode" API modifies the "Global width" property of the polyline.

Blocks
Update 1

• When you turn off the display of an attribute with a visibility parameter in a dynamic block, the Enhanced Attribute Editor lists attribute prompts incorrectly.
• You cannot copy an object from an AutoCAD 2009 drawing and paste it as a block into an AutoCAD 2010 drawing.
• You cannot use the Properties palette to set the value of a action parameter to 0.
• When you delete a constraint parameter from a dynamic block, AutoCAD may become unstable.
• You cannot stretch some dynamic blocks as expected.

Check Spelling
Update 1

• When you run spellcheck on uppercase words, AutoCAD may become unstable.

CUI
Update 1

• When you save a workspace, if the Enterprise CUIx file is read-only, AutoCAD may become unstable.
• Toolbar flyouts close unexpectedly.

Customer Involvement Program
Update 2

• AutoCAD may fail to start up on Windows 7 workstations with Windows 2008 Server on the same subnet.

Data Extraction
Update 1

• When you use Data Extraction to extract the value of a block's multiline attribute into a table, text formatting code displays in the table.

Update 2

• Constrained attribute values may not extract properly based on drawing order.

DGN Support
Update 1

• When a DGN file is imported, some attributes are missing.

Update 2

• Restores the ability to use any extension when attaching DGN files.
• DGNIMPORT command with "Ignore all external references" option may not work.

Digital Signature
Update 1

• When you open a drawing, the Invalid signature dialog box may display even if the digital signature is valid.

Dimensions
Update 1

• You cannot create an angular dimension between two lines in different XY planes.

Update 2

• AutoCAD may become unstable when stretching multiple dimensions with dimbreaks applied.
• Cyrillic characters in dimension text may cause AutoCAD to incorrectly report that the drawing is corrupt after running RECOVER.

DWF
Update 1

• When the background color in AutoCAD is black, some DWF underlays do not display correctly.

DXF
Update 2

• When opening some DXF Files, you may receive a DXF error.

Dynamic Dimensions
Update 1

• When you use the COPYBASE command with Dynamic Input on, AutoCAD may become unstable.

ETransmit
Update 2

• AutoCAD may become unstable when using eTransmit.

Express Tools
Update 2

• AutoCAD may become unstable when editing height values for arc-aligned text in the Properties Palette.

Export Layout
Update 1

• When you use the EXPORTLAYOUT command on files in which Standard styles have been renamed, AutoCAD may become unstable.

External References
Update 1

• You may not be able to bind multiple xrefs that include nested xrefs.
• With the XATTACH command, you cannot select multiple xrefs.

Update 2

• Xrefs with true color gradients now display properly in 2D graphics modes.
• AutoCAD may display an error message about logic color -5 when attaching an xref.
• AutoCAD may become unstable when binding an xref.
• AutoCAD may become unstable when using right-click menu on an xref.

File Open
Update 1

• When you try to open a drawing file from a FTP site, AutoCAD may become unstable.

Update 2

• After applying Vista SP2 or on Windows 7 it is not possible to double click and open a folder that is using DFS Namespace.
• AutoCAD drawings saved in Vault may not display 2010 properties properly.
• Opening drawing files from older releases of AutoCAD may take a while to open.
• Unable to use asterisk "*" symbol on wildcard searches.

Find and Replace
Update 1

• If you use Find and Replace, autonumbering is deleted.

Font
Update 2

• AutoCAD may become unstable when using older version ".SHX" fonts.

General UI
Update 1

• On the status bar, the model or paperspace button may be missing, even after you have repeatedly turned it on.

Update 2

• AutoCAD may become unstable when more than one bubble is displayed and then closed.

Graphic System
Update 1

• When the background color is changed in an active paperspace viewport, the cursor disappears.
• After you plot a drawing in AutoCAD, if you lock Microsoft Windows and then unlock it, AutoCAD may become unstable.

Hatch
Update 1

• When you turn off the current layer while grip editing a hatch boundary, AutoCAD may become unstable.
• When the UCSVP system variable is set to 0, hatched objects align with the WCS rather than the UCS.
• When you grip-edit a hatch with an elliptical boundary, AutoCAD may become unstable.

Update 2

• AutoCAD may become unstable when double clicking on hatched areas in a drawing.

Image
Update 1

• When you attach some TIFF images, AutoCAD may become unstable.
• TIFF images may not display correctly.

Update 2

• Rotating an image with plines may appear to offset from the image.
• AutoCAD session may hang when plotting drawings with rotated Mr SID images attached.

InfoCenter
Update 2

• Balloon notification in InfoCenter is blank when Windows 7 display Theme is set to Classic.

Inquiry Tools
Update 1

• The AREA command fails on some polylines.

Keyboard Modifiers
Update 1

• When temporary overrides are enabled, keyboard input using the Shift key may not display on the command line.

Layers
Update 1

• Xrefs on locked layers do not display faded as expected. The LAYLOCKFADECTL system variable fails to alter them.
• When you delete a certain layer, all layers may be deleted.
• On the ribbon, the Layer drop-down does not display layers based on the current layer filter.

Update 2

• Layer groups may not remain deleted after reopening the Layer Manager.
• AutoCAD may become unstable when switching layouts if the Layer Description column is frozen.
• Objects on "layer 0" in an external reference do not display when the layer is turned on from the current drawing.

Licensing
Update 1

• When you set your system time back more than 2 days, your license is broken.
• When you use a proxy server for Internet access, the License Transfer Utility fails.

Linetype
Update2

• Some of the linetypes with text do not display correctly.

LiveUpdate
Update 1

• When you have Autodesk 2009 and AutoCAD 2010 installed side-by-side, LiveUpdate does not work in AutoCAD 2009.

Measurement Tools
Update 1

• When you use the MEASUREGEOM command, the tooltip and command line results are different. The tooltip result is incorrect.
• When you use the DIST command in model space, the results at the tooltip and the command line are different. The tooltip result is incorrect.

Migration
Update 1

• When you export certain profiles, AutoCAD may become unstable.
• When you save certain profiles migrated from AutoCAD 2009, AutoCAD 2010 may become unstable.

Multileader (mleader)
Update 1

• When you mirror mleaders that contain blocks with multiline attributes, the mirrored attributes are incorrectly justified.

OLE
Update 2

• AutoCAD can be slow when updating OLE objects in Microsoft Word 2007.
• "Paste to Original Coordinates" is disabled in right-click context menu after copying objects from another open drawing.
• AutoCAD may become unstable when pasting drawing files into Microsoft Word.

Organic Modeling
Update 2

• Gizmo may not display while in 3D Orbit.

Osnap
Update 2

• 64-bit AutoCAD may become unstable when using PRESSPULL on mesh object.

PDF
Update 1

• When you plot a drawing as a PDF file, the layer order is not alphabetized as expected.
• When a drawing that contains layers with names that include special characters is exported as a PDF, it cannot be opened.
• When you attach a large PDF file to your drawing, or try to attach it and then cancel the operation, performance is slow.

Update 2

• AutoCAD may hang when plotting large images to PDF.

Property Palette
Update 2

• AutoCAD may become unstable when using the Property Palette.

Publish
Update 1

• When Windows XP is set to Windows Classic theme, on any Asian language version of AutoCAD 2010, if you use the PUBLISH command, AutoCAD freezes.

Purge
Update 1

• On Windows Vista, in the Purge dialog box, when you attempt to use the Ctrl or Shift keys to select multiple items, the first highlighted item is de-selected.

Quick Access Toolbar
Update 2

• Opening a linked drawing from a Microsoft Office product may cause the Quick Access Toolbar to no longer display.

QUICKCALC
Update 1

• Calculations performed by the QUICKCALC command may be incorrect.

Recover
Update 1

• When you use the RECOVER command on an AutoCAD 2000 formatted drawing file, polylines and splines in the drawing are deleted.

Update 2

• Opening drawings with dense hatch appear to hang at 31%.
• Some older drawings containing 3DSOLIDS do not display.

Reference Edit
Update 1

• When you use the REFSET command, you can only add one instance of a block to the reference set. Other instances are rejected and an error message displays.

Ribbon
Update 1

• Text styles from an attached xref display in the Ribbon text style control.
• When you switch between AutoCAD Classic and other workspaces (for example, 2D Drafting & Annotation or 3D Modeling), performance becomes slow.
• Layers with a VP Freeze for a viewport indicate the VP Freeze status even when the viewport is not active.
• When you click the File menu in the zero doc state, AutoCAD freezes.
• After you unload a partial CUI file, a tab remains on the ribbon. If you click the tab, AutoCAD may become unstable.

Update 2

• AutoCAD may become unstable when switching to the Render tab of the Ribbon when .NET 4 is on the system.
• Legacy menu bar may display over the Ribbon when AutoCAD is not responding while opening large drawings.
• AutoCAD may become unstable when using Clipping Boundary control in the Ribbon.
• AutoCAD may become unstable when dragging a Ribbon Panel on Windows 7 64-bit operating system.

Section & Flatten
Update 1

• When you section solids through API, multiple memory leaks occur.

Update 2

• SECTIONPLANETOBLOCK may not work correctly when the sectionplane is not intersecting an object.
• After using the command SECTIONPLANE AutoCAD may become unstable.
• SECTIONPLANE may not display all cutaway geometry.

Seek
Update 1

• The SHAREWITHSEEK command may not work if the port used to communicate with Seek is blocked by a firewall.

Snaps
Update 1

• When you snap to the grid, there may be a slight offset from the grid.

Text
Update 2

• Bigfont may not be converted properly when saving a DWG to 2004 file format.

Visual Basic
Update 2

• May not be able to restore minimized AutoCAD with VBA loaded.

Visual Lisp
Update 1

• When you use the CECOLOR system variable, the value returned by using the Getvar function is incorrect.

Update 2

• LISP incorrectly converts some Japanese characters to CIF.

AutoCAD MEP® 2009 Update 2 Now Released

autocad_mep_suite_2009_update2_win_32bit.exe

autocad_mep_suite_2009_update2_win_64bit.exe


The following defects have been fixed in AutoCAD MEP 2009 Update 2

Duct

• Duct Sizing should more accurately produce the correct size in metric units.

Electrical

• The Load property on Devices will now schedule the loads of each phase instead of only phase 1.
• Object Snaps on scaled Devices will now behave more consistently.
• Devices which contain annotation will produce an image in the Property Palette which matches the image in the Select a Style dialog

Pipe

• Using grips to modify a Pipe layout during a Reference Edit session no longer causes disconnections in the pipe layout.
• AutoLayout should not produce overlapping pipe segments when connection two existing pipes to each other.

Tool Palettes

• Multi-view Part tools will respect Part Size Name when executed.

Miscellaneous

• Invalid Enum Map String message is no longer encountered when using the MvPartModify command on a multi-view part which does not exist in the active catalog.

The following defects were fixed with AutoCAD MEP 2009 Update 1 and are also fixed in AutoCAD MEP 2009 Update 2:

Catalog editor

• Unable to Write Check Permissions error occurs when copy and paste parts into the same catalog.

Duct

• Duct sizing does not always provide the expected size when using Metric units

Electrical

• Power Totals tool does not always state the correct load.

Pipe

• Pipe segments will be offset from each other when using justification which is not Center/Center.
• Insulation will not be applied to pipe fittings when using the match properties.
• In some instances pipe object are not visible until a regenerate is performed.

MvPart

• Invalid Enum Map String error when using MvPartModify on a multi-view part created via MvPartConvert command.

System

• AutoCAD warning message when saving an External Reference.

General Updates to AutoCAD Architecture

The following defects have been fixed in AutoCAD Architecture 2009 Update 2

Annotation scaling

• Multi-view blocks inserted from user created tools did not scale properly when used in subsequent drawings or sessions.

Drawing management

• Projects created from project templates did not inherit the correct sheet storage location property.
• Projects created from project templates did not inherit sheet subset storage location information.
• The application would occasionally crash when creating project details.

GBXML

• Surfaces belonging to different walls would export with the same CadObjectId.

IFC

• Spaces, railings, footings, and column objects might be exported with an incorrect object type identifier in some localized releases.
• Half spaces would be imported as large modifiers.
• Slab fascias and soffits would not properly export in some localized releases.
• Level and elevation info would be created in reverse order when an IFC file was imported into a project.
• Material sets applied to walls of type "Shared" would not export correctly.

Schedules

• The schedule quantity column evaluated property values without first applying the property data format.

Wall objects and opening endcaps

• Certain endcap configurations might cause walls to disappear in 3d isometric views.
• Some walls might not draw completely at a locked z elevation.
• Using "Add selected" for anchored doors, openings, and windows could cause an application crash in some circumstances.
• Walls might fail to clean up properly across xrefs if the host drawing used different drawing units than the xref.

Miscellaneous

• Tooltips would appear for AutoCAD entities even when ROLLOVERTIPS was set to zero.
• Saving a drawing to the 2004 file format would take an exccessive amount of time.
• Export to AutoCAD might cause an application crash in some circumstances.

The following defects were fixed with AutoCAD Architecture 2009 Update 2:

AModeler

• The application might crash when cutting or refreshing sections or elevations containing certain structural members.

Drawing Management

• For localized versions of AutoCAD Architecture, callouts and labels would occasionally fail to resolve when dropping views.
• The application might crash when viewing the external references of a project drawing that was resaved as a different project drawing type.
• It was not possible to drag a project entity from one file to another when hardware acceleration was enabled, if the host drawing did not use the 2d wireframe visual style.
• The application might crash when plotting immediately after cancelling a previous plot job.

IFC

• Fillet radii would not be imported reliably for certain parameteric profiles.
• Parametric profiles without voids would not be imported reliably.
• Spaces with clipping and holes would not import reliably.
• Wall styles would not be reliably converted and mapped on import.
• Curtain walls might not be import properly on localized versions of AutoCAD Architecture.

GBXML

• gbXMLspan would export a value 1000 times too large for AirChangesPerHour in metric drawings.

OMF

• The application would occasionally crash on shutdown.

Wall Objects

• The face of a wall might not draw correctly in isometric view for certain endcap configurations.

Display System

• Autodesk Civil 3D users could end up with a style referencing a non-existent hatch.

Miscellaneous

• Memory would not be released to Windows when closing a drawing.
  

General Updates to AutoCAD

The following defects have also been fixed:

3D Navigation Tools

• When you use the ViewCube in some drawings, AutoCAD freezes.
  .NET API
• If you create a wipeout object through .NET API, a fatal error may occur.

Annotation Scaling

• The scale of annotative text changes when you use LISP entmod() to change the properties of the annotative text.

Attributes

• When a drawing contains xrefs, the -ATTEDIT command fails.

Autodesk Buzzsaw

• In the File Navigation dialog box, when you use the Add a Buzzsaw location shortcut option, AutoCAD crashes.

Blocks

• When you copy and paste a dynamic block, associative hatches do not work.
• After you redefine a block definition, associative hatches in dynamic blocks display incorrectly.
• When you open a drawing, a polyline in a block may have a very large width.
• After you open a drawing, some dynamic blocks lose their dynamic properties.

Data Extraction

• Data Extraction cannot finish operations in some cases.
• The Data Extraction Combine Record Mode > Sum values option does not work correctly.

DGN Support

• When you import some DGN files, AutoCAD crashes.

DIM

• If alternate units is on and you edit dimension text, the alternate units text is duplicated.

Export a Layout to Model Space

• If .NET 3.5 Service Pack 1 is installed and you use the EXPORTLAYOUT command on some layouts, AutoCAD may stop responding.

External Reference ESW

• The FIND command performs slowly when you search for text.

Groups

• Rollover highlighting does not go away.

Hatch

• When you bind a drawing with an xref that contains annotative hatches, AutoCAD crashes.

Hide/Shade

• When you use the HIDE command with a drawing that contains text, some objects may not be hidden.

Image

• When you attach a corrupted raster image to a drawing, AutoCAD crashes.

Layer

• When you zoom to a locked viewport, the Layer palette updates

Layouts

• When you attempt to switch layouts in drawings, an Out of Memory crash may occur.

Materials

• When you import a 3DS file with texture, AutoCAD may crash.

Menu Browser

• Some menu macros do not work.

Multileader (mleader)

• Mleader custom arrowheads are not brought over to the drawing from the Tool palette.

Multiline Text (mtext)

• When you edit mtext in a viewport, it may be duplicated in other viewports.

Open/Save

• Osnaps on polylines and mesh objects do not work correctly.

Plot

• When you plot upside-down, an OLE object does not plot correctly.
• A drawing that contains hatches and gradients may plot slowly.
• When plot area is set to View, AutoCAD LT may crash.

Publish

• When you attempt to publish multiple sheets with PUBLISHCOLLATE=1, only the first sheet of the set is plotted.

Quick Properties

• When you edit multiple mtext objects through the Quick Properties palette, AutoCAD crashes.

RECOVER

• When you render some drawings, AutoCAD runs out of memory.

Ribbon

• If the ribbon is displayed and you select portions of a mtext object that contains multiple formats, the mtext object becomes distorted.

Selection

• When you select objects in groups, AutoCAD may crash.

Tables

• When you edit text with space before or after the text within a table cell, AutoCAD crashes.

Text

• When you move text to a new position within a drawing, it disappears.

Tool Palette

• When you attempt to edit the properties of multiple Tool Palette tools, an Out of Memory crash may occur.

Known Issues with This Update

• After installing this update you may receive a "Error Code: 3010" message incorrectly claiming that the update failed. You can verify this by viewing installed updates through the Windows control panel.
• After you apply this update, you may experience the following ribbon customization-related problems:

An Incorrect or Missing Ribbon Tab

• Known Issue: When you display a ribbon tab from a partial or Enterprise CUI file, on the ribbon, the ribbon tab displays incorrectly or is missing.
• Workaround: To correctly display a ribbon tab, recreate the workspace used to display the ribbon tab from scratch. Do not duplicate or attempt to update the workspace. Once you create a new workspace, set the workspace current. The ribbon tab should display correctly.
• For a partial CUI file, before you add a ribbon tab to a workspace, use the Customize User Interface (CUI) Editor to change the customization group name of the file. The customization group name is represented by the uppermost node of the tree in the Customization In pane.

A Blank Image for a Command

• Known Issue: On a ribbon panel, the image associated with a command defined in the Command List pane displays as a blank icon.
• Workaround: To recreate a ribbon command item on a ribbon panel, delete it. Then, from the Command List pane, add the command to the ribbon panel.

WAN Acceleration 2009 Hotfix

Autodesk finally released a hotfix to improve the performance of saving to 2007 DWG format when running in a WAN Acceleration environment. The problem was an Autodesk problem, and not anything related to any particular Wan Accelerator as some people have thought. This is a Hotfix posted by Autodesk that you can also view from the following links...

2009 Wan Acceleration Hotfix link
2008 Wan Acceleration Hotfix link
2007 Wan Acceleration Hotfix link


Description of Problem
WAN acceleration technology typically relies on data-deduplication as a significant part of accelerating data transfer. The 2007 DWG format is written to disk with a type of error-checking that has the side-effect of nearly every byte of the file changing during full-save, even if little was changed. WAN accelerators fail to deduplicate the 2007 DWG data and must transfer nearly all bytes in the 2007 DWG file. This results in a slow-down during full-save when working over a slow WAN.

This hotfix will make a small change in the way the 2007 format DWG files are written to disk such that WAN acceleration hardware will be better able to deduplicate the 2007 DWG data; this will provide some performance gains for SAVE operations when users are saving across a WAN acceleration environment. The resulting 2007 DWG file will be readable whether or not others have this hotfix, but to achieve the best performance everyone working on the same DWG should install this hotfix.

After intalling the hotfix, you must set the Windows environment variable, ACADCOMPRESSIONMODE to 1 for it to have effect.

Note: For AutoCAD, you can often get performance gains in QSAVE operations by setting the ISAVEPERCENT system variable to 100. Using a value of 100 will maximize the chance that a QSAVE operation will use incremental-save rather than full-save. (WAN accelerator technology is able to show good performance in deduplication of 2007 DWG format files when incremental save takes place.)

Applicable Products
AutoCAD 2009
AutoCAD LT 2009
AutoCAD Architecture 2009
AutoCAD Civil 3D 2009
AutoCAD Electrical 2009
AutoCAD Land Desktop 2009
AutoCAD Map3D 2009
AutoCAD Mechanical 2009
AutoCAD MEP 2009
AutoCAD P&ID 2009
AutoCAD Raster Design 2009
AutoCAD Revit Architecture Suite 2009 (1)
AutoCAD Revit MEP Suite 2009 (2)
AutoCAD Revit Structure Suite 2009 (1)
Autodesk Inventor™ Professional 2009 (3)
Autodesk Inventor Suite 2009 (3)

(1) Apply this hotfix only if the installation includes AutoCAD 2009.
(2) Apply this hotfix only if the installation includes AutoCAD MEP 2009.
(3) Apply this hotfix only if the installation includes AutoCAD Mechanical 2009 or AutoCAD Mechanical Desktop® 2009.

Installation Instructions

To Install the WAN Acceleration Hotfix
You must have administrative privileges on your Microsoft® Windows® operating system to complete the installation process.

This installation requires you to replace the following files:

• acdb17.dll
• AcSignCore16.dll

After you replace these files, you must restart your system in order for this hotfix to take effect.

NOTE: Only apply this hotfix after you have installed an AutoCAD 2009-based product. This installation requires you to modify an installed product, which may cause Windows security warnings to display. For all Windows security warnings that display during installation, click Continue.

To Replace the acdb17.dll File

1. Close all software applications.
2. Navigate to your product installation folder; for example C:\Program Files\AutoCAD 2009.
3. In the product installation folder, right-click the acdb17.dll file and select Properties.
4. Click the Version tab and confirm the file version.
5. If the file version is 17.2.56.0, 17.2.111.0, or 17.2.112.0, proceed with this installation.
6. If the file version is greater than 17.2.112.1, do not install this hotfix.
7. Rename the affected original file.
8. In the product installation folder, right-click the acdb17.dll file and rename it acdb17.bak.
9. Based on the product you have installed and its version of the acdb17.dll file, double click the appropriate file.
10. For AutoCAD 2009-based products with the acdb17.dll file version 17.2.56.0
11. Based on the version of your product, double-click WAN_Accelerator_Hotfix_2009_32bit.zip or WAN_Accelerator_Hotfix_2009_64bit.zip.
12. For AutoCAD 2009 Update 1 with the acdb17.dll file version 17.2.111.0 or 17.2.112.0
13. Based on the version of your product, double-click WAN_Accelerator_Hotfix_2009_Update_1_32bit.zip or WAN_Accelerator_Hotfix_2009_Update_1_64bit.zip.
14. Extract acdb17.dll file to the product installation folder; for example C:\Program Files\AutoCAD 2009. NOTE: Keep the zip file that you used in step 6 open. Without opening other software applications, immediately proceed to the procedure below .

To Replace the AcSignCore16.dll File

1. Navigate to your Autodesk Shared folder; for example: C:\Program Files\Common Files\Autodesk Shared.
2. In Autodesk Shared folder, right-click the AcSignCore16.dll file and select Properties.
3. Click the Version tab and confirm the file version.
4. If the file version is 17.2.56.0 proceed with this installation.
5. If the file version is greater than 17.2.112.1, do not install this hotfix.
6. Rename the affected original file
7. In the Autodesk Shared folder, right click the AcSignCore16.dll file and rename it AcSignCore16.bak.
8. Double-click the zip file you used when you replaced the acdb17.dll file. See To Replace the acdb17.dll File, Step 6.
9. Extract the AcSignCore16.dll file to the Autodesk Shared folder; for example: C:\Program Files\Common Files\Autodesk Shared.
10. Restart your system.

To set the ACADCOMPRESSIONMODE environment variable

On Windows XP

1. Right-click My Computer, and then click Properties.
2. Click the Advanced tab.
3. Click Environment variables.
4. Click New to add a new system variable name and value.
5. Set the Variable name to ACADCOMPRESSIONMODE
6. Set the Variable value to 1
7. Click OK until you return to the desktop

On Windows Vista

1. Right-click My Computer, and then click Properties.
2. Right-click My Computer, and then click Properties.
3. Click the Advanced system settings link.
4. Click Environment variables.
5. Click New to add a new system variable name and value.
6. Set the Variable name to ACADCOMPRESSIONMODE
7. Set the Variable value to 1
8. Click OK until you return to the desktop

To Uninstall the WAN Acceleration Hotfix

1. In the product installation folder
2. Delete the acdb17. dll file that you downloaded.
3. Restore the file you renamed to the original name. See To Replace the acdb17.dll File, Step 5.
4. In the Autodesk Shared folder
5. Rename the AcSignCore16.dll file to AcSignCore16.dll.hotfix.
6. Restore the file you renamed to the original name. See To Replace the AcSignCore16.dll File, Step 4.
7. Restart your system.

For more information about this issue, I have previous posts around it
WAN war breaks out over changed file formats in AutoCAD MEP
Reduced write performance for Riverbed WAN links when working with AutoCAD MEP 2007 DWG files
WAN Accelerators Part II