>>Did you guys ever figure this out? I'm starting to get this error ocassionally now myself.
>
>How many rows does the rowsource have? IOW, what are you asking the combo to perform?

Actually, there are quite a few rows but the number is dynamic and based on the results of a select statement I build for each combobox control. Even the control is instantiated dynamically on this form via AddObject(). What happens is the combobox is based on a cursor created via SELECT &lcBuiltSelectStatement into cursor sys(2015). The value in the combobox determines the filter for a column in a childgrid on the same form. The combobox has no function other than to display the rows. It has no event methods with any code it. The expression evaluation error I get happens when I tab out of the combobox. Otherwise, I'm not "doing" anything with the control.

FoxPro Help is more intriguing "Expression evaluator failed (Error 67) An internal consistency check in the Visual Foxpro expression evaluator failed. This might be caused bu a damaged Visual FoxPro object code file. Recompile the program that caused the error."

What code do you suppose it's talking about? The VCX class? You can't compile a form so I'm guessing that's it. Or, can a Visual Foxpro base class become corrupt? (Shoot but wouldn't THAT just explain why I've "suddenly" started having weird "Cannot instantiate object ..." errors?!?!)

Does this give you any more clues? Don't you hate when this sort of this starts to happen -- inconsistently -- at the last minute, just when everything's been working fine up until?