For files opened I/O with random or dynamic access, the Btrieve file position indicator is moved to the position of the record to be changed. After performing the REWRITE operation, the file position indicator is restored to its original position, although this could fail if the record to re-position on has been deleted.
This problem does not occur for files with sequential access because the file position indicator is already on the record to be rewritten and so re-positioning is not necessary.