Two file-names in SORT statement found in the same SAME SORT/SORT-MERGE AREA clause. Ignored.
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Cause . . . . . : No pair of files in a SORT statement may be specified in the same SAME SORT AREA or SAME SORT-MERGE AREA clause. File-names %1 and %2 belong to the same SAME SORT AREA or SAME SORT-MERGE AREA clause.
Recovery . . . : Specify only one of the two files in the SORT statement.