There's a special file ipnat needs in /dev (whose name escapes
    me).  Have you created it?  You can check its name by looking
    at strings ipnat | grep dev

Or you can use ktrace/kdump.  This is a *really* good way to
figure out what mysterious file some program needs, or, more
generally, just which system call buried deep in some library
is failing.

Dave Eckhardt
davide+@cs.cmu.edu