Mode and or duplex incompatibilities. This can't be the problem in this case. I'm running both nodes inside the same VM (VirtualBox), so they share the same NIC. I have replaced the file copy by a screen copy: NFT TI:=SNAKE::LB:[1,2]EXECUTIVE.HLP (EXECUTIVE.HLP is 259. blocks) and I can see random freezes. A successful, uninterrupted transfer takes 7 seconds. It hangs almost every time I write to disk: NFT FOO=SNAKE::LB:[1,2]EXECUTIVE.HLP I suppose virtualization needs some extra caution. I have to browse simh at trailing-edge archive for what have been said about VirtualBox. -- Jean-Yves Bernier