I know there is a big warning about making sure to compile ruby with --enable-pthread if you have a thread enabled Tk. Maybe this is the problem? What platform/ruby/tk versions have you got? I'm afraid I don't know much about debugging core files either though. Jason On 7/14/05, Joe Van Dyk <joevandyk / gmail.com> wrote: > My ruby/tk application is segfaulting. Seemingly randomly. How can I > figure out why? I have a core dump, but don't have much experience > debugging those. > > Thanks, > Joe > >