Thanks for the feedback.
> What I would first pursue, per analogous ADSM QuickFacts entry:
>
>     Query  operation Error - Library is Offline to Host.
>         In response to something like 'mtlib -l /dev/lmcp0 -qL' means
that
>         there is no access because the 3494 is itself offline.  Go to
its
>         operator station and go to Mode Online.

The library has always come back-online by itself. The "blips" seem to be
short-term.  Most of the time, TSM hasn't noticed.

>         For utmost assurance, check that the lmcpd is running, that your
>         /etc/ibmatl.conf is correct, and if a LAN connection that within
the
>         3494 Library Manager you have authorized your host to access it.
>
> If this is a persistent problem, check the 3494 panel for any
> issues, including
> Availability of all components.
>

Have checked. Nothing is wrong/offline. Nothing in the logs (per IBM)

> If this is an intermittent problem, then look to something like a Denial
Of
> Service monopolization of the subnet, or its moral equivalent: get
> your network  people involved.

This is a private, internal subnet. This TSM is the only one using the LAN
connection.

> If no issues there, try shutting down and power cycling the
> 3494, watching for any problems indicated as it comes up. Perhaps also
restart
> the lmcpd on your host.  Use ping and periodic mtlib query commands
> to determine under what circumstances the outage is occurring.
>

IBM suggested this when they first looked at it, for this problem.  If the
problem persists, I may suggest that to operations.

Again, thanks for your suggestions/ideas.  I never thought to check your
"ADSM Quickfacts" since I thought this might be OT: