Two things you can try:

1. Run VFPCLEAN.APP in the VFP home directory
2. Delete your FoxUser.* files

>The very annoying bug (having just lost 45 minutes of class code I am a bit heated) whereby you get a C5 error upon typing in the opening bracket of a custom class method can be fixed by turning off intellisense or at least clearing out all of your custom commands etc. This renders it useless though.
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>Has there ever been a solution posted to the problem by Microsoft or anyone here ? I usually remember to save just before typing in a custom object method call but forget from time to time.
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>To me this is the most annoying VFP7 bug by a mile.
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>Jamie