Hmmm....do you have the latest service pack for VFP? I recall having a problem similar to this at one time. If you DO have the latest service pack you might try rebuilding the project, recompiling everything, doing a scandisk/defrag on the hard drive. If those all fail, maybe attempt reinstalling VFP. It's been a few months since it happened to me, but I'm sure thats the sequence I approached the problem, and it DID go away. (Don't panic, no need to restart the project). Let me know if this doesn't work and I'll put some more effort into recalling what happened to me.