>>>The result is no rows shown in the grid. (Not the empty grid you'd get without Safe Select). If I click onto _SCREEN and then back on the form, the grid fills in.
>
>IME this infuriating and time-wasting "feature" usually improves if you formally setfocus() to a control away from the grid before repopulating/refreshing it. I don't believe that a toolbar button will suffice; try thisform.btnDummy at -100,-100 whose only purpose is to receive focus. Bring focus back to the grid afterwards if needed.

This one did the trick. I set focus to a button and then back to the grid and all is well.

Thanks all for your suggestions.

Tamar