I noted the bit in the map defiition which says I can can include names of surveys in the map command so that the centrelines are drawn. I tried this with the terikan survey and therion just says 'error' in the compiler and doesn't say what. Running Therion standalone shows that it is segfaulting. You should be able to demonstrate this with the dataset I uploaded last night. Comment out the join soundrivercrab_s1 soundriver2_s1 line so it runs,then add the name of a survey (I tried 'river' and 'goon') to theend of the scrap list. Now it crashes. I noticed the bit about -projection being required 'if the map contains survey', but adding "-projection plan" to the map command didn't help. This looks like a bug. And is there some subtlty about adding surveys (centrelines) to maps? Wookey -- Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK Tel +44 (0) 1223 811679 work: http://www.aleph1.co.uk/ play: http://www.chaos.org.uk/~wookey/