Sunview crashes on Sun 3/60's

[krishna at amarna.gsfc.nasa.gov]

             We have the following problem on our Sun 3/60's:

   While in sunview, opening a new window (shelltool or commandtool)
   or while just working within a window, the system crashes and
   exits out of sunview, with a message like

                   Reset tty pgrp from 122 to 114   
                   selection_svc exiting : Hangup
                   Could'nt reach service to yield: RPC: Timed out...

   This has happened on three machines (Sun 3/60's) this morning.
   The server is a Sun 3/180 . We are running SunOS 4.1

                   Has anyone seen this before ? Please e-mail me
   if you have any suggestions.
                                            Thanks,

                                            V. Krishna
                                    e-mail: krishna at ssvs.gsfc.nasa.gov

   PS: I have checked the /tmp on each machine. It is'nt overflowing
       Am not sure if it's a network related problem. netstat -i did'nt
       indicate anything unusual.