TERMSESS →     RPL:     ACB field → ACB
                        Note: ARG and NIB are mutually exclusive.
                        ARG field = CID of session or pending active
                                        session to be terminated
                        NIB field → NIB:
                             Note: NAME and CID
                             are mutually exclusive.
                             NAME is required if
                             the NIB field is used.
                             NAME field = symbolic name of PLU
                             NETID field = symbolic network identifier of PLU
                             CID field = CID of session or pending active
                                        session to be terminated
                             LISTEND field = YES
                        Note: ECB and EXIT are mutually exclusive.
                        If ECB is used, only one is allowed.
                        ECB field → external ECB
                        ECB field = internal ECB
                        EXIT field → RPL exit routine
                        BRANCH field = YES|NO
                        OPTCD = (SYN|ASY,COND|UNCOND|
                                       UNBIND|TERMQ,SONCODE|NSONCODE)
                        PARMS = (SONCODE = code)
                        SSENSEO field = CPM|STATE|FI|RR|0
                        SSENSMO field = system-sense modifier value (or 0)
                        USENSEO field = user-sense value (or 0)
 
     Registers 0 and 15 = return codes
 
     RPL:     RTNCD field = recovery action return code
              FDB2 field = specific error return code
              REQ field = request code (44)
              SSENSEI field = CPM|STATE|FI|RR|PATH|0
              SSENSMI field = system-sense modifier value (or 0)
              USENSEI field = user-sense value (or 0)