If snapping is necessary, CA Datacom/DB looks for a DD statement with a name of SNAPER. If it is not provided, CA Datacom/DB dynamically allocates a DD statement for SNAPER with the value SYSOUT=*. Unless you want a specific SYSOUT class or other options, do not provide the DD statement. CA Datacom/DB also dynamically allocates a SYSPRINT DD statement when needed if you do not provide it. The SYSPRINT DCB BLKSIZE and LRECL defaulted or are set based upon the DBSIDPR module assembled with the DBSYSID macro with keyword LINE=NEW or LINE=OLD. With LINE=NEW (the default) the BLKSIZE defaults to 0 if not set and the LRECL defaults to 133 if not set. With LINE=OLD, the BLKSIZE defaults to 121 if not set and the LRECL is set to 121, overriding any value provided. With LINE=OLD, if you specify a different block size in the JCL, it must be a multiple of 121. The exception to this is the COMM OPTION=SNAPCSA. This utility requires the SNAPER DD statement. During certain errors or on request, DBUTLTY can direct an address space snap to DD statement SNAPASnn, where nn is a sequential number such as 01.
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