DFS2084 INVALID RETURN FROM SIMEXIT, EXIT DISABLED.

Explanation
 The DFSSIML0 exit routine, upon returning to IMS control
with a return code of 8, did not provide a transaction name in the
area pointed to by register one, or the transaction name is given
is invalid.

System action
 DFSSIML0 processing is bypassed by IMS, and
a return code of zero is assumed.

Operator response
 Continue normal I/O activity.