I have this issue from time to time, and I so frustrated. Sometimes after I modify a form, it won't open in form view. It will open in design view, but nothing happens if I double click on the form name or change it from design view to form view. In fact, if I go from design to form view, the form just closes . I've read a few remedies about changing the pop up from yes to no, then save, then reopen.... That worked before, but it's back to its annoying way. I'm convinced that it's a Microsoft bug, but how's everyone else overcoming this issue? By the way, I've compacted and repaired but to no avail.