Recently, we had upgraded Documentum 5.25 SP5 to Documentum 5.3 SP5. We proceeded to upgrade the client workstations without error. When attempting to upgrade the image of the workstation, I received an unusual error. Documentum 5.3 SP5 Application Builder appears to install correctly until the pop-up error “Failed to verfy/update MFC dll entry in registry – Expression failed: str != NULL;”.

The solution was found in the Documentum Developer forums at http://www.dmdeveloper.com/forum/showthread.php?t=7537.

Solution:
At a command prompt, type the following:
C:\>cd %SystemRoot%\system32 (or where ever your directory is located.)
C:\WINDOWS\system32>regsvr32 mfc42.dll

However, my solution, more simplified.
Start > Run > regsvr32 mfc42.dll

Tested and worked successfully. The installation was a success.