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  Message:      RT107
 
  Text:         Operation not implemented in this Run-Time System
 
  Severity:     Fatal
 
  Explanation:  You are attempting to perform a file operation which your
                run-time system does not support.
 
  Resolution:   You will have to recode your program so that it does
                not attempt such operations, or you will have to
                acquire a version of your system that does support
                this facility.
                                    -♦-