While upgrading from Documentum 5.2.5 SP5 to Documentum 5.3 SP5, the client workstation upgrades completed successfully. However, when installing Documentum 5.3 SP5 Application Builder on a workstation image, the installation failed with the following error:

Failed to verify/update MFC DLL entry in registry
Expression failed: str != NULL;

The installation appeared to proceed normally until the error dialog was displayed, causing the setup to fail.

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Cause

This error can occur when the Microsoft Foundation Class (MFC) library is not properly registered in Windows.

Resolution

Re-register the mfc42.dll library and then rerun the installation.

Open the Run dialog and execute:

regsvr32 mfc42.dll

Alternatively, open a Command Prompt and run:

cd %SystemRoot%\System32
regsvr32 mfc42.dll

A confirmation message should indicate that the DLL was successfully registered.

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Result

After registering mfc42.dll, the Documentum 5.3 SP5 Application Builder installation completed successfully without any further errors.