



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
Electrical
Pipe
Tool Palettes
Miscellaneous
The following defects were fixed with AutoCAD MEP 2009 Update 1 and are also fixed in AutoCAD MEP 2009 Update 2:
Catalog editor
Duct
Electrical
Pipe
MvPart
System
General Updates to AutoCAD Architecture
The following defects have been fixed in AutoCAD Architecture 2009 Update 2
Annotation scaling
Drawing management
GBXML
IFC
Schedules
Wall objects and opening endcaps
Miscellaneous
The following defects were fixed with AutoCAD Architecture 2009 Update 2:
AModeler
Drawing Management
IFC
GBXML
OMF
Wall Objects
Display System
Miscellaneous
The following defects have also been fixed:
3D Navigation Tools
Annotation Scaling
Attributes
Autodesk Buzzsaw
Blocks
Data Extraction
DGN Support
DIM
Export a Layout to Model Space
External Reference ESW
Groups
Hatch
Hide/Shade
Image
Layer
Layouts
Materials
Menu Browser
Multileader (mleader)
Multiline Text (mtext)
Open/Save
Plot
Publish
Quick Properties
RECOVER
Ribbon
Selection
Tables
Text
Tool Palette
Known Issues with This Update
An Incorrect or Missing Ribbon Tab
A Blank Image for a Command
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:
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
To Replace the AcSignCore16.dll File
To set the ACADCOMPRESSIONMODE environment variable
On Windows XP
On Windows Vista
To Uninstall the WAN Acceleration Hotfix
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