“Error applying transforms” during Citrix XenApp HotFix Installation

During a recent troubleshooting session with a Citrix XenApp 5 server, I wanted to make sure that the server included the recommended hotfixes.  But when trying to run the downloaded .MSP file the following error was displayed:

 

Windows Installer Error applying transforms. Verify that the specified transform paths are valid.
Windows Installer Error applying transforms. Verify that the specified transform paths are valid.

Windows Installer Error applying transforms. Verify that the specified transform paths are valid.

This happened over and over with every hotfix downloaded.  This server had originally been deployed via System Center Configuration Manager 2007 (SCCM 2007) and I was wondering if the installation cache files had been removed and needed to be downloaded from the distribution point again.  The files were correctly in place, but the hotfix wouldn’t run.

Eventually I bypassed the transform file completely by temporarily renaming the “Transforms” value under the following key to “Transforms.old”:

HKEY_CLASSES_ROOT\Installer\Products\AD9C782BBE7D2D54AB21D40174D9444F

After that was renamed I was able to successfully install the hotfix, restart and rename the registry key back to the original value.

Note: This article also posted to my work blog here.

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