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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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.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:      RT026
 
  Text:         Block I-O error
 
  Severity:     Fatal
 
  Explanation:  An error has occurred while you are attempting to
                access a disk.  This could be the result of a corrupt
                disk.
 
  Resolution:   If you have a corrupt disk try to run your program
                again using your backup copy.
                                    -♦-