Open CPN comes in an untrusted PPA so you probably need to report it to them or investigate via their forums. That said, the PI is a popular topic for Ubuntu MATE. Have you tried running the program from the command line, that should give you a message or messages about what is going on and/or where it is failing. It's just that this bug area isn't designed to be a support forum per se.
** Changed in: ubuntu-mate Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1468337 Title: OpenCPN opens for little moment in Ubuntu Mate 15.04, then closes immidiately To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1468337/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs