My program which has been working for years froze up the running versions and won't load the new version. The error says the VCT is missing or invalid. The path it shows for the class isn't even in the users' mappings and never has been. They are running an EXE on another drive, which shouldn't need any access to my code drive. I have restored an old copy of the VCT and VCX files and rebuilt everything in the hopes it would take care of the problem. I don't understand how the class could affect older versions of an exe. The update I just made is inconsequential. Is there something I'm missing? Meanwhile I'm stressed and they're dead in the water.