You can control the running of a transaction program from its TP profile. To prevent a transaction program from being scheduled or to stop new requests for a TP, run the APPC administration utility with the TPMODIFY command to change the active status of the TP to NO. You can also modify a TP profile by using the APPC administration dialog.

Active status is controlled by the ACTIVE keyword in the TP profile; its value can be either YES or NO. The following example shows the TPMODIFY utility command that deactivates a TP named MAIL.

  ...
  //STEP     EXEC PGM=ATBSDFMU
  //SYSPRINT DD   SYSOUT=A
  //SYSSDLIB DD   DSN=SYS1.APPCTP,DISP=SHR
  //SYSSDOUT DD   SYSOUT=*
  //SYSIN    DD   DATA
    TPMODIFY
       TPNAME(MAIL)
       SYSTEM
       ACTIVE(NO)
  /*

If the TP is running when you change its active status from YES to NO, the TP instance that is running is allowed to complete, and all queued requests are also allowed to complete. No new requests for the TP, however, are allowed.

For information about the APPC administration utility, see Using the APPC/MVS Administration Utility.