cobol3.hlp (Topic list)
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Message 0040 (↑ Syntax Messages)
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  Message:      0040
 
  Text:         Missing or illegal file name
 
  Explanation:  The file name you have specified either does not conform
                to COBOL rules for file names, or has not been declared in
                the FILE-CONTROL paragraph. This may be due to a misspelled
                valid file name.
 
  Resolution:   Correct the file name (or, if necessary, add a file
                description entry to the file-control paragraph).
                                    -♦-