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  2. MI400
  3. November 2001

Re: More fun with nullmaps

James,
If you open the file for output only, then append the null map directly
after the field data when you write a record.

But if you open the file for input-or-update-or-delete in addition to
output, and you do not use blocking, then insert eleven blank bytes after
the field data and before the null map.

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