> In fact MVS says "CANCEL COMMAND ACCEPTED", sets a bit in the
> appropriate TCB and goes on with its work, supposing that the task will
> respond neatly to this CANCEL bit, but guarantees nothing.

  That is not correct.  CANCEL does a POST of the CANCEL ECB, on which the
initiator task is WAITing.  The initiator task then does a CALLRTM 
TYPE=ABTERM
of the jobstep task. 

Jim Mulder   z/OS System Test   IBM Corp.  Poughkeepsie,  NY

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