All kinds of possibilities. Not the least of which is that an application that shares a Dll with your app was uninstalled, taking the shared Dll with it.

>I really hope someone can solve this. I have an application installed at many customer locations - same .exe file for all. All have been running latest release for at least several months. At one location - where again the .exe file has been in use for some time - when the user visits a simple data entry screen, she receives an error that reads "Error loading file ... record # 3 ...Loading form or data environment: ... OLE error ... Class not registered". How is it possible to get this message from an .exe file that normally runs every day? How can a class not be registered that was registered just an hour ago? TIA.