@lorry Hi Lorry, thanks to @larsbrinkhoff for connecting us, great to see where you have got to with MUD. In the end I got as far as getting MUD running from the 1986 source I have on TOPS 10 monitor 7.04 which keeps MUD.TXT and VALLEY.TXT as separate MUDs. If I understand your post correctly you have a combined MUD/VALLEY.TXT. If you are willing I would be keen to get hold of the version you have to see if I can get it up a running on my simh setup. Let me know if that is possible? Thanks!