Passing return-code information
Use the RETURN-CODE special register to pass return
codes between
programs.
(Methods do not return information in the RETURN-CODE special
register, but they can check the
register after a call to a program.)
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You can also use the RETURNING phrase
in the PROCEDURE DIVISION header of a method to return
information to an invoking program or method.
If you use PROCEDURE DIVISION . . . RETURNING with CALL
. . . RETURNING,
the RETURN-CODE register will not be set.