I came across this error whilst trying to uninstall CA ITM on our Server, after a little bit of research it was because the original location of the installation media had moved, for example in our case I originally installed the product from the d: in the server i have subsequently move the installation files to one of our NAS drives.
To correct this problem you need edit a registry key located at HKEY_CLASSES_ROOT\Installer\Products\ I then did a search for the product name and in the right hand column it listed a Transform key with a file path which pointed to the old location, I simply changed the path to the new on and then uninstalled from add/remove programs and it worked fine.