I have this problem for a long time.

I created a form with a grid a lot of columns and a combo box based on a local view. In the form, I haved another combo box (This time, not in the grid) The control source is different for the two.

The problem is when I run the form, some times, the combo box do not open. The other combo is working out just fine. I've got this problem on many forms.

I've done some searches and I think this behavior is happening just when I've got 2 combo boxes with the rowsource based on the same view.