SunFire-280R, L9, Networker: kern.notice lus_intr(3.0.0): transport failure

I have a fresh Install of Solaris-8 with latest recommended patches. An L9
tape library is being used by Networker version 5.5.4. On the first full
backup networker had no problem with with the library. Today networker is
having trouble operating the L9. The following is appearing in
/var/adm/messages:

May 22 09:36:04 atlantis root: [ID 702911 daemon.notice] NetWorker media:
(warning) /dev/rmt/1cbn opening: I/O error
May 22 09:42:30 atlantis last message repeated 3 times
May 22 09:42:37 atlantis lus: [ID 497811 kern.notice] NOTICE:
lus_intr(3.0.0): transport failure (incomplete)
May 22 09:43:14 atlantis last message repeated 3 times
May 22 09:44:38 atlantis root: [ID 702911 daemon.notice] NetWorker media:
(warning) /dev/rmt/1cbn opening: I/O error

Looks like some patch is needed. Any info on "lus_intr" ?

TIA

BB

[889 byte] By [CodeProf.com] at [2007-12-24 22:46:00]