Is is possible that you've already got something running that has allocated 00C? That would account for the:
IEF244I RDRF .00C .IEFRDER UNABLE TO ALLOCATE
error message. Do a "DISPLAY A":
d a
IEE821I 11.21.37 ACTIVE DISPLAY 069 C
PNO JOBNAME STEPNAME SUBT STAT PNO JOBNAME STEPNAME SUBT STAT
RDRF 00C WTRZ WTRZ
WTRF 00D WTRF 00E
001 INIT A,E
and see if you have maybe an existing RDR or RDRF active to 00C. I don't think I automatically started a reader to 00C, but one might have gotten started somehow.
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