Good Morning, My name is Ricardo Constantino, and I have just started using Therion / Survex - so please bear with me :-) I am running survex 1.0.39, and therion 0.5.0 on Windows XP. I have a little test survey (both in svx and th files) with 9 stations. When I run the svx file directly in Survex I get a correct 3d file, which Aven displays with the 9 stations and 8 legs. However, when I run the same survey (either as a 3d import or natively in the .th file) the result displays the stations but not the interconnecting legs - even the survex log generated from the therion compilation reads that there are 9 stations but 0 legs ! Even a simple 2, 3 station survey directly in Therion, generates the pdf plan view, but only the stations are marked in the file (there are no lines interconnecting the stations). What am I missing here ? Thanks in advance, Ricardo (www.ENTRADA.tv) BTW : the concepts behind both these applications are great - I just hope I will have a chance to try all the powerfull features ! Thanks guys.