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I have tried updating the framework (1.6.6 released version), then I tried updating to the most recent DevEx version (8.2.4).  I have removed the grid and replaced it with another instance.  All attempts have resulted in the same behavior.

Does anyone have any idea why the XtraGrid is causing this error to popup?  Btw, I can answer 'No' and continue using the form.  I'd really like to use the XtraGrid rather than the EnhancedList (which is nice, but lacks a couple of necessary features). 

Thanks for your help!
Bill