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The Question is:

DIFF may abort with an error message indicating that it does not support the
 file format and/or record size.
DUMP on the other hand appears to support all file formats and record sizes.
However, a DIFF on DUMP output will always produce differences. Because of the
 block header info. and date that DUMP also writes. Any suggestions on how to
 compare files that DIFF does not support?
Thank you very much.

The Answer is :

  Write your own?  Port an existing tool?  Translate the data into a format
  supported by an existing tool?  There are likely other options.
  The /IGNORE=(HEADER=1) qualifier on the DIFFERENCES command might well be
  of interest -- this command causes DIFFERENCES to ignore the time-dependent
  header lines in the DUMP output files.
  Various other /IGNORE options are described in the on-line help for the
  DIFFERENCES command.
  For information and an introduction to commands and file formats available
  on OpenVMS, please see the OpenVMS documentation set.  Please consider
  researching this question and the available formats, in order to determine
  the best alternative(s) for your particular application, your budget, and
  your local environment.
  Should you require on-going formal assistance with this or with other
  topics, or assistance in porting or translating file data, please contact
  the customer support center or the services organization.

answer written or last revised on ( 21-MAY-2002 )

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