When trying to update an Endevor Processor, it fails with a S013 in the GPPROCSS INITLIST step:
Change the C1DEFLTS parm PRBLKSZ to 0 or specify the value for this parameter that is a multiple of 121.
PRBLKSZ=0 - Indicates the blocksize to be used for temporary files when compiling processors. If you are on a version of z/OS that does not support BLKSIZE=0, you must specify the value for this parameter that is a multiple of 121.
PRBLKSZ=0
Indicates the blocksize to be used for temporary files when compiling processors. If you are on a version of z/OS that does not support BLKSIZE=0, you must specify the value for this parameter that is a multiple of 121.