My version of subsurface crashes when deleting dives in a particular way. Here is a dataset : https://www.dropbox.com/s/zi5l9ez0s9laf9y/test1.xml Delete the top 6 dives by deleting the dive at the top of the list each time. Then delete dive number 4 (dated Sat Jul 6th) Program crashes. I apologise for making you life difficult. willemf