Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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  Message:      RT203
 
  Text:         CALL parameter not supplied
 
  Severity:     Fatal
 
  Explanation:  The item you are trying to access in the Linkage Section
                of the currently executing program has not been initialized.
 
  Resolution:   Recode your program to ensure that it contains all of
                the necessary parameters, or check that it is a valid
                caller.
                                    -♦-