User is attempting to upgrade from WebSphere Data Interchange MultiPlatform Server Fix Pack 4 to Server Fix Pack 7 on a Windows machine, however when they attempt to apply the fixpack they encounter an error "Unable to Install due to Product not Existed in Target Drive."
User installing fixpack as a different user than what the server was installed with.
Resolving the problem
1. Right-click on the fixpack executable and select runas.
2. Then select the following user radio button.
3. Then select the user name from the drop-down box that was used to install the original server code.