Welcome to the forum!

I'm sure you realize how out-of-date both 9.1 & CRXI are - so I won't bore you with that...

Do you get any other sort of error? Have you looked at the event log? If it's a bad DLL (corrupted, etc.) there should be a Windows error. If not, then I'd think it most likely that the system is not finding it. You have it in the Programs folder of the workspace?

There are various DLLs & such that all need to be in the programs folder for CR to work correctly. I don't remember offhand all the names, but if a DLL that CRPE32 depends on is missing, that could also cause it.