Well, I guess it isn't the Sun NFS bug. I tried it between a DECstation 3100 (Ultrix 3.1) and a Sun Sparc 1 (SunOS 4.0.3) and it does fail. Looking at the packets with etherfind, I see nulls in the packets at the exact places they ended up in the file. Looks like Ultrix is messing up the file. Mike Iglesias University of California, Irvine