Many people talked about reducing the group size of the net. Since
I was running with the three generic Ultrix groups , that did not help.
Ric Anderson's reply solved the problem. On the Sun systems run "rpc.mountd"
without the "-n" security option. That clears the path for the mounting process
but not without a hassle. The Sun system had to be rebooted and the filesystems
rmounted from the automounter. It did not work at interactive mode. Another
little detail is that on the Ultrix side the "mountd" daemon was running with-
out the "-i" optiion. Since that worked I left it alone and now the net is
Many thanks to all the people that replied.