SORT uses tape files when ITD or tape-only sort operations are requested. SORT can use between 3 and 8 tapes. To eliminate the necessity for operator intervention to resolve “DUP FILE” messages, the sort tape files are named as follows:

SORT0M<task number>
SORT1M<task number>
SORT2M<task number>
SORT3M<task number>
SORT4M<task number>
SORT5M<task number>
SORT6M<task number>
SORT7M<task number>