DFS1937I USER EXIT DFSxxxx0 LOADED
Explanation
The security exit routine identified in the message has been loaded. If RACF is also active, RACF is called before the exit routine. xxxx0 can be DFSCSGN0, DFSCTRN0, or DFSCTSE0.
System action
The exit routine is called for signon or transaction security, depending which exit routine is loaded.
Programmer response
None. If you do not want the exit routine loaded and called, remove it from the STEPLIB concatenation.