>>What happens if you shudown VFP and try to use Windows Explorer to make a copy? Can you work on the copy that way?
>
>I get the same message "Class xxx in use by Modify Class"

I've had that once... and I've tried several things, don't remember which worked. Created backup, then tried to hack it, rebooted once (in case there was a stranded copy of VFP still holding it), removed foxuser.dbf, used class browser to copy it elsewhere, opened the vcx as a table and packed it (or pack memo), tried Compile Class... one of these worked, don't know which.