AutoCAD 2011 for Mac: Update Beta for OS X Lion
Inventor 2012 GPO deployment, Windows 2003 Server, Error Add operation failed

AutoCAD Family: Unhandled Exception in acmgd.dll ARX Command

Unhandled Exception errors are one of the toughest things to troubleshoot.  The good thing is that we have a solution for:

  • Unhandled Exception E0434F4D (e0434f4dh) at address 7c81EB33h
  • Unhandled Exception E0434352 (e0434f4dh) at address 7c81EB33h

Civil3d-1-error - Copy

We had to add Read and Read & Execute to the group Users and/or Everyone for the following files:

Windows XP/Vista/7 x86 (32 bit)



Windows XP/Vista/7 x64 (64 bit)



I had to update this reference post as well.



If you have the same product installed on serveral computers and the error happens only on 1 computer, you can copy the folders above from a working computer to an non-working computer to easily transfer the proper permissions.

Thanks to John Lee for sharing this additional tip with the community.


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Do I understand then version 4 has to be installed prior to installation of Civil 3D 2012? I did not see that option on the installation disk. Thank you.

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