Stopping APPC
You use the /STOP APPC command to prevent new users or programs from allocating APPC conversations with the IMS APPC BASE LU.
The /STOP APPC CANCEL command prevents
new users or programs from allocating APPC conversations with any IMS APPC LU. In both cases, the conversation
is rejected with a TP_Not_Available_No_Retry return
code by APPC/MVS.