>In my application I use the cenviron.vcx from CodeBook to save and restore the "Set Environment" and i got the error (File is in use ) on the command line "set resource on" and when i remove this command line no error occur
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>Do you Have an idea of what is the probleme?
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>My application was build with VFP 5.0a and the application was multi-user on Win95

Do you have more than one instance of VFP running? When you open Fox and have RESOURCE=ON, it uses the FOXUSER.DBF exclusively.