>The C000005 message happens when I'm coding, not in the app. I'll be typing away at some code and fox takes a dive. It's not terribly frequent, but irritating.
>>
>>It is difficult to say, but if I have your code I could debug it.
>>Especially C0000005 Error could arise from mismatched values in cases, that you could not imagine. I had theese error when my GridControlSource-s get missing (this happens in comlicated grids) or some ComboBox ControlSource with wrong value...

Sometimes InteliSence makes that crashes. Did you remark when does this happen. If the error rises when you type dot or opening a bracket, try to turn your InteliSence off.