Any help on this would be greatly appreciated. Thanks!

Background: Addin written in VB6 for Microsoft Excel. Works great 99% of the time.

Problem: One or two customers have experienced this error and the addin no longer runs: "Unable to load Application.COMAddins.Item(ADDIN_NAME).object.ADDI N_CLASS", where ADDIN_NAME and ADDIN_CLASS are substituted with the correct name and class.

Solution: We've had this problem happen internally once. Were able to fix it by removing the user profile associated with the user experiencing the problem and then recreate the user profile. (Other users on same machine continued to work OK.) No reinstall of addin required.

Question: Does anybody know what might be going on here? Any documentation on how a COM addin could get "corrupted" for one user and not others and/or what profile-specific information is in the registry that we could look for?