>>>Hi, Ed. Respectfully, I don't think the gentleman _is_ using views...Perhaps he will clarify (i.e. throw a sock at me) if I'm wrong about this :-)
>>>
>>>...snip
>>>
>>>>>Thanks for the tip, but I don't think it applies since I'm not using buffering.
>>>>
>>>>It's applied because you will use view.
>>
>>Ed, Nancy is correct that I'm not using views, but I suspect that what you are advocating is to change my data source to a parameterized view using the parent table's primary key as the parameter. Is this correct?
>
>Yes, this is correct.

Thanks for your help. After further investigation of my code, I found the problem. Somehow I had placed an UNLOCK() in the BeforeRowColumnChange event and an RLOCK() in the AfterColumnChange event. Since the application is a single-user one, removing this code did the trick.