Ah ha! I have solved the problem that prompted me to ask the above question.
The problem was that I had duplicate selection of the same map in my thconfig file. A result of my idle double-clicking in the Map Structure pane in the XTherion compiler, and thinking I had removed the spurious entries so created. For the TO DO list: Maybe it would be a good idea to test for duplicate map selection and report. The errors that eventually occurred made me think there was an error in a scrap drawing. Still, I'd like to know how to identify the objects referred to by the bracketed numbers, so I can tidy up the few "scrap outline intersects itself" errors that I get. Bruce -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20090113/e886d1b0/attachment.html>