MESSAGE   The Turbo Update tape that was mounted on the tape drive
          does not match the version of the Turbo Update data files.
          (TUERR 30)

CAUSE     The Turbo Update Master Tape mounted is not the same version
          as the TUINSTAL program.  This could be caused by the
          TUINSTAL program not being successfully restored from the
          front of the Turbo Update Master Tape.

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MESSAGE   The tape mounted on the tape drive is not a Turbo Update
          format tape.  Please mount the correct tape, and run
          TUINSTAL again.  (TUERR 32)

CAUSE     A tape other than the Turbo Update Master Tape was mounted
          on the tape drive (perhaps a scratch tape in preparation of
          the sysdump operation).

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...so maybe that one-record file containing "19" is the tape version number.

Running TUCOPY will copy from TU tape to disc or vice-versa.  Maybe this
can be used to check the format.