From: Michael Swinhoe [mailto:mike.swinhoe AT UK.ZURICH DOT COM] 
> I have had the same error with our TSM environment.
>  The PLM is AIX. And we have 5 * W2K library clients 
> connected to a LTO.
> The problem was that when RSM was enabled they were all picking up the
> Library changer, which therefore stopped any tapes being mounted.  The
> solution was to disable the RSM services and installed the TSM device
> driver.  We have had no problems since.

...just like it says in the installation/configuration instructions.
 
--
Mark Stapleton (mark.stapleton AT berbee DOT com)
Berbee Information Networks
Office 262.521.5627