While running CA Dispatch maintenance job DSEXTMIG customers can experience an abend S0C4-4 while running program CADSARPT in step MIGRATE4.
Dump analysis actually shows the S0C4-4 is occurring in program ICEXPUB which is part of IBM DFSORT™ product.
Also, message ICE185A AN S0C4 ABEND WAS ISSUED BY DFSORT™, ANOTHER PROGRAM OR AN EXIT (PHASE S 1) is found in the DFSORT™ report.
This problem is described in IBM document PI16208: ABEND0C4-4 AT X'6418' INTO ICEXPUB AT PTF LEVEL UK96411 FOR RELEASE V2R1(L00) .
Click here to get to the IBM link.
Note that this problem is likely to occur on sites with DFSORT™ 2.1 when running any program step that calls SORT using SORTWORK data sets.
Please, contact your IBM representative to get a copy of the corrective.