Mike,

All I know, the computer has VF8 runtime files from RTM and SP1 and they conflict. Where they are and how they got there I wouldn't know.

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>So just having him remove any VFP8RTM files from the Windows System directory should be sufficient? My InstallShield app didn't put VFP files in the Windows directory...how would they have gotten there?
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>>The error has nothing to do with VFP6. The computer has VFP8RTM runtime files somwhere on the Windows search path, most likely in the Windows System directory.
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>>>I have a customer who is getting a 'Resource File Version Mismatch' when trying to start my upgrade. It occurs right after installation.
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>>>My app uses VFP8ENU.DLL and he has an account billing program that uses a VFP6 dll. All of the files from my app are contained in the application's folder but when starting up, my app seems to be accessing the VFP6 dll which causes the error. This is strange because he previously had both apps running without conflicts prior to installing my upgrade.
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>>>How can he have both applications run without conflicting? I don't want to do anything to his accounting program if at all possible.