stropen: out of stream resources

[George Pontis]

Ladies and Gentlemen ...

Can someone direct me to a solution to the problem we have that leads to
the following error message ?

	stropen: out of stream resources

The message appears when a user logs into the server and starts suntools.
This occurs every few days, and at least once was preceded by very slow
system response. The only "solution" that I've found is to reboot. Our
configuration has just three Sun3 workstations; the server is a 3/60 with
8 Megs running 4.0.1 with yapt 5.5 patches. All thoughts, comments, etc.
welcome ! 

Thanks,
George Pontis
...uunet!moldev!geo