The File operation is not valid; there are no common key fields. The specification is ignored.
30
Cause . . . . . : The operation has an externally-described file specified in Factor 2 (positions 36 - 49) but there are no common key fields for the file. The specification is ignored.
Recovery . . . : Access using record name, or create the file again with records having at least one common key. Compile again.
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