Help!! Problem with Ultrix/LAT

[Robert D. Haskins]

We are running Ultrix 4.1 on a DECSystem 5400.  We have a number of HP
Laserjets connected to our Ethernet via DECserver 300s, and print to them
from our VAXes.  When we print from the Ultrix node, LAT will not release
the connection, the output file filter process goes to the T state and the
input file filter goes to the I state.   No other system can print to the
printer because of the active LAT connection.  The only way to release the
connection is to logout the DECserver port or kill the 'offil' process.
Neither DEC nor HP has been of any help in this matter.

We are using Brian Utterback's filter sets (pulled off the net) and a
printcap entry of the following:

lp21|21|wrhs2a:
     :fc#0177476:
     :fs#0000301:
     :xc#077737:
     :xs#000040:
     :sh:
     :sb:
     :ct=lat:
     :ts=LAT11:
     :op=PORT_16:
     :lf=/usr/adm/lp21err:
     :of=/usr/local/offil:
     :if=/usr/local/iffil:
     :db#1:
     :lp=/dev/tty51:
     :os=:
     :pp=/bin/pr:
     :sd=/usr/spool/lpd21:

I would greatly appreciate hearing from anyone with experience setting up HP
LaserJets off of DECserver 300s under Ultrix, as we have been floundering
around with this problem for months.