Troubleshooting
Problem
This technote explains why attempts to update an IBM Rational ClearCase or ClearQuest release area with an iFix, patch or fix pack results in the error, The upgrade patch cannot be installed by the Windows Installer service..., and provides instructions to resolve the problem.
Symptom
Attempts to patch a ClearCase or ClearQuest release area on a Microsoft® Windows® platform with a fix pack, iFix or Service Release results in the following error:
The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade patch may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade patch.

Note: The program, version, and upgrade patch may appear to be correct.
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Document Information
Modified date:
16 June 2018
UID
swg21158679