SDLCMDRS start option

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   .-SDLCMDRS--=--(--STATS--,--INOPS--)-----------------.   
   +-SDLCMDRS--=--YES-----------------------------------+   
>>-+----------------------------------------------------+------><
   '-SDLCMDRS--=--+-YES-------------------------------+-'   
                  +-NO--------------------------------+     
                  +-STATS-----------------------------+     
                  +-NOSTATS---------------------------+     
                  +-(--,--INOPS--)--------------------+     
                  +-(--,--NOINOPS--)------------------+     
                  '-(--+-STATS--+-,--INOPS---+---+--)-'     
                       |        '-,--NOINOPS-'   |          
                       '-NOSTATS--+-,--INOPS---+-'          
                                  '-,--NOINOPS-'            

Specifies whether VTAM® records SDLC inoperative and statistical miscellaneous data records (MDRs) in LOGREC.

Note: If you do not record MDRs, and a problem occurs in an SDLC device, problem diagnosis can be difficult because there are no MDRs in LOGREC.

STATS,NOSTATS and YES,NO mean the same. STATS,NOSTATS is the preferred coding. YES,NO is supported on this start option for compatibility with prior releases.

You can change the value of SDLCMDRS with the MODIFY VTAMOPTS command while VTAM is running.
YES
Specifies that VTAM records the SDLC statistical MDRs in LOGREC.
STATS
Specifies that VTAM records the SDLC statistical MDRs in LOGREC.
NO
Specifies that VTAM does not record the SDLC statistical MDRs in LOGREC.
NOSTATS
Specifies that VTAM does not record the SDLC statistical MDRs in LOGREC.
INOPS
Specifies that VTAM records the SDLC inoperative MDRs in LOGREC.
NOINOPS
Specifies that VTAM does not record SDLC inoperative MDRs in LOGREC.