Library offline to host

[<James> <healy>]

Can anyone suggest a place to look when I get a message: library offline to
host.
I've already recycled lmcpd. I checked my lan host options and they haven't
changed.
When I attempt to communicate with the 3494 library via MTLIB commands from
my sun server I get this message.
We made a microcode change to the library over the weekend and this one
server(out of three) is now not communicating with the library.
two other sun servers are not having any problems via mtlib or thru TSM.