VTAM was cancelled by VSE when an OPERATOR issued a PFLUSH for an application partition that was hung. The PFLUSH is a destructive command and should only be used if the partition cannot be cancelled. There is no ESTAE routine in VSE VTAM like there is in MVS VTAM.
A PFLUSH does not have any consideration for any pending requests for the partition. These pending requests can also cause the closure of the VTAM ACB. In any case, a STATUS command should be mandatory before operators cancel a partition. A CANCEL should then be attempted first or a CANCEL xx,FORCE if cancel alone will not terminate the partition.
The IST997I cancel code 41 is normally issued when VTAM is cancelled by VSE and in most cases it is not the result of a VTAM problem. This can also happen if there are application abends just prior to the VTAM partition being cancelled. The application abends need to be pursued. If a PFLUSH was issued in a partition just prior to VTAM being cancelled then it needs to be determined why the partition was PFLUSHED. A VTAM cancel in this case is a result of the PFLUSH of the other partition.
Symptom
0S12I SUB VTAMRP CANCELED DUE TO MAINTASK TERMINATION
0S12I MAIN TASK TERMINATION
0S00I SUB ISTPDCLU CANCELED
0S07I PROBLEM PROGRAM PSW = 070C0000 806539B6
0S12I MAIN TASK TERMINATION
0S00I SUB ISTINMLS CANCELED
0S07I PROBLEM PROGRAM PSW = 070C0000 8066C064 IST997I JOB VTAMSTRT CANCELED. CANCEL CODE 41 ISTINCVT/ISTINCWT+????
Cause
A PFLUSH was issued for another partition.
Environment
VSE
Resolving the problem
Use CANCEL instead of PFLUSH for a partition. A STATUS command should be issued before operators cancel a partition. A CANCEL should then be attempted first, a CANCEL xx,FORCE if cancel alone will not terminate the partition."
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