UMBCOD9R user exit blues

List,
        I've put some code in COM user exit UMBCOD9R, which will fire at
line item entry time. To my surprise, this program fires TWICE for each line
item entered. Once the user enters their inital data and hits <enter>, the
program fires and displays the window I coded. Great. The user answers the
prompt in my window, hits <enter>, and gets sent to ATP. Fine so far. But,
as soon as they <enter> out of ATP, the user exit fires again and my display
window comes up.
        I talked to Mapics, whose only suggestion was that this exit may run
in response to an error condition of some kind. If there were true, it would
run repeatedly in a loop. I've always had this exit fire exactly twice. Has
anyone else run into this? Any suggestions?
        Thanks in advance.....

John Furniss
Allied Machine & Engineering Corp.
iSeries Application Programmer
Phone (330) 343-4283 Ext. 8371
email: jfurniss@xxxxxxxxxxxxxxxxx