I get a stack error every time I go into AR-A into a Customer to update or change their credit limit.  I make the change and exit and then try to save the customer.  The customer screen stays but the screen listing all customers appears on top of it.  When I close the customer listing screen, it says "Internal stack error has occurred.  Close and restart the application.  Too many pops".  Then both screens close, and the credit info did not save.  I only have one EVO screen open when this happens,and I have no other apps open.  Our IT department has checked everything and I have sufficient memory and virtual memory.  This has been going one for months.