Posted on May 26, 2016 by Synergis Product Support Manager, Darin Green

After upgrading your AutoCAD application from 2015 or earlier to 2016, you may notice a performance hit during the launch of the AutoCAD application. This is a known issue and Autodesk published a hotfix to resolve the issue.

The following issues are addressed by this hotfix:

• May crash when panning transparently in multiple viewports.
• Performance problem opening files containing specific objects in AutoCAD 2016 may appear as if files cannot be opened.
• Use of the LISP (command) function within the (mapcar) function results in VVC Internal Error.
• Grip stretch doesn’t work properly when DYNMODE equals value other than 2 or 3.
• acedCallBackOnCancel is not detected for Lispcallable Functions.
• Certain VBA Macros throw an execution error.
• DWG file fails to insert into another DWG file.
• May crash when Copy/Paste a block by Ctrl+C, Ctrl+V.
• May crash when opening AutoCAD in Windows 10.
• exe launched when running OPTIONS command.
• Annotations in Architectural Units format are changing to Decimal format.

Use the following link for more information on this hotfix:

Autodesk® AutoCAD® 2016 Hotfix 3