Unknown error during CLOSE

  Explanation:  The system produced an error when closing a file.
  No more detailed information is available.

  User Action:  Use the special symbol RMS-CURRENT-STS to see which
  RMS error caused the CLOSE statement to fail.

  If the RMS condition is common, please submit a problem report
  suggesting that a better message be provided.  Be sure to include
  the value of RMS-CURRENT-STS in your report.