The File-Addition entry is not valid for this device; defaults to blank.
20
Cause . . . . . : The File-Addition entry (position 20) of a File Description specification is A, but the Device entry (positions 36-42) is not DISK. Defaults to blank.
Recovery . . . : Omit the File-Addition entry (position 20) or specify DISK (positions 36-42) for the Device entry. Compile again.
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