It does look like some other than current grid gets activated. I would dig in that direction.

>>What's the current work area when error occurs? Is't one of views?
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>Yes, it is one of the views - if it is not a coincidence, it is the one from which last records were 'exported' to the cursor.
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>>...Do you've any code in the Form/Page Activate?
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>Yes, I set some form properties and enable/disable some controls. In the page with the problem, I had a grid.setfocus, but I disabled that and it didn't make any difference. Also, as I said, the table that needs to be selected IS the recordsource of the grid.
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>>... Any timers in effect?
>No.
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>