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  Message:      RT030
 
  Text:         File system is read-only
 
  Severity:     Recoverable
 
  Explanation:  The file system which you are using is read only,
                which effectively means that it is write-protected.
                You have tried to change a file in some way, for example
                you may have tried to WRITE to a file or to DELETE
                information in it.
 
  Resolution:   You will have to abandon your attempt to alter the
                file unless you can make your own personal copy of it.
                You should then be able to alter the contents of your
                copy, but not of the original source.
                                    -♦-