I found an issue that was causing access violations, and yes it was very hard to find.
A variable lookup listview, located on a enhanced tab control, with a where clause (where scn = .vscn) would choke when the variable vscn was set to null. When I set it to 0 (a valid lookup) the access violations stopped, a null would fail the lookup. Normally this var is set to 0, but I added a form that sometimes set it to a null and then returned to the previous form and AVs started. There may be other contributing factors, so I will test further and report to RBTI. I hope this helps someone else. Kenny Camp
