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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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.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:      RT023
 
  Text:         Illegal or impossible access mode for CLOSE
 
  Severity:     Recoverable
 
  Explanation:  The mode in which you are attempting to close a file
                is not possible for that type of file.
 
  Resolution:   Close the file with a new access mode which is
                compatible with that type of file, or execute a STOP
                RUN statement and recode your program.
                                    -♦-