Hello everyone - Suggestions please! As a Linux user I have never tried using Compass. A week ago I discovered that Therion can create output files in Compass "PLT" format. I created a file and sent it to a friend who is a big Compass user. He reports that it will not import. To test, I created a Windows computer in VirtualBox and then installed Compass (version 5.10.1.23.267) on it. I confirmed my friend's observation. When I try to open the PLT file in the Compass viewer, it gives an error: "Invalid numeric input" When I try to open the file in the Compass editor, it give a different error: "1916543.04 is not a valid integer value" Looking at the PLT file with a Linux text editor shows no obvious problems. It appears to be a collection of GPS coordinates associated with survey stations. It is not a large file - about 36K bytes, which seems a bit small for a cave with almost 800 survey stations and about 15,000 feet (4.5 km) of passage. The line I used to generate the file is: export model -fmt compass -o BigCavernRanch.plt I tried adding "-enable all -wall-source all" to the compile line, but it made no difference. It did not even change the size of the file. I am using Therion version 5.4.1 on 64-bit Fedora 28. Thanks! -- Bill Gee