The Sequence entry is not valid; defaults to Sequence entry of first file using matching records.
20
Cause . . . . . : Two files using matching records have opposite Sequence entries (position 21 of the File Description specifications): A (ascending) and D (descending). The Sequence entry of the subsequent file using matching records defaults to the Sequence entry of the first file that uses matching records.
Recovery . . . : Specify identical Sequence entries (position 21). Compile again.
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