How can a user detect an omitted parameter on a CALL?

Problem:

  If the sub-program is called:

       CALL "subprog" USING OMITTED OMITTED WS-VAR-3.

The following error occurrs:

Execution error : file 'subprog.int'

error code: 203, pc=225, call=1, seg=0

203     CALL parameter not supplied

How do I validate which parameter is omitted to avoid this error?

Resolution:

The 203 error is correct as you need to test for the presence of each parameter before attempting to modify it in the sub-program.

This is done with the following code:

      if <variable-name> is not omitted

          move ...

and so on.