The file is not allowed with built-in function %EQUAL.
20
Cause . . . . . : For built-in function %EQUAL, the file specified as the parameter must have a Device entry (positions 36-42 on File Description specification) of DISK. In addition, built-in function %EQUAL is allowed only for files that allow operation code SETLL. The built-in function is ignored.
Recovery . . . : Specify a valid file name as the parameter for %EQUAL. Compile again.
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