UPDATE
Keywords: class

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##
UPDATE

            LAS\UPDATE

        Update the LAST version of the observation in the R buffer in the output
        file. You can update only the last version. The  update  OVERWRITES  the
        observation.  This command MUST BE USED WITH CAUTION; in case of complex
        manipulations of observations, you may get confused and  erase  precious
        data.

        If  more space is needed (e.g., the new version has more header informa-
        tion), an error is returned. You MUST  then  WRITE  the  observation  to
        avoid loss of information.

        The only typical case where it may be used is in the following sequence:
            GET Number
            MINIMIZE or MODIFY
            UPDATE