Hi, newbie Therion user excited by the prospect of electronic maps. My first steps have been successful, but I've got stuck. I'm using Windows XP and Xtherion 0.5.1 I can produce centreline plots of single or multiple surveys from multiple *.th and thconfig files in multiple directories to *.pdf, *.xvi and *.lox files. That much I seem to understand. I can scan *.jpg images of my surveys and trace them to produce *.th2 files that look fine both in the map editor and the text editor. I think I understand how this works, it seems easy enough. When I place the following in my surveyN.th file, input RBMtestplan.th2 map m_plan_ent -title "Map plan entrance" scrap1 endmap and the following in thconfig. source surveyN.th select m_plan_ent@n . I get one of two results; a) a line plot that ignores the scrap and produces only a centreline as if the scrap did not exist, or b) an error; Mostly I get the error; viz "D:\Program Files\Therion\therion.exe: error -- RBMtestplan.th2 [7] -- invalid length reading -- -scale" (Sometimes the error is -- invalid length reading -- -projection) And the offending line is; scrap scrap1 -projection plan -scale [-128 -1296 880 128 0.0 0.0 25.60 0.0 meters] This "seems" to follow the required syntax, and is generated automatically by the map editor. The samples I downloaded work fine, and I can not see my trial differs materially. Both results are unsatisfactory. I would like a drawing of the cave. I suspect I may not be scaling the sketched survey stations to the centreline survey stations correctly(?) Any suggestions what I am doing wrong? Any suggestions how I can go about debugging the problem? Thanks Bruce Mutton