Robert,
I had similar grid problems. Check thread 171005 for the lengthy discussion and a temporary solution.

HTH
Barbara

>Thanks John. I've also found that if I replace the suspicious grid on the form with a standard (non-subclassed) grid, then things work better also. I'm going to try to determine what might be going on with the sub-classed grid.
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>Bob
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>>When I get that error at READ EVENTS I could usually get rid of it by removing the line ON SHUTDOWN CLEAR EVENTS. Now, another way it might happen, for me, was when I tried to use any command with the WINDOWS keyword after the READ EVENTS, such as RELEASE WINDOWS ALL.