Please give us as much detail as you can. When you ask for help with any piece of software, your question to a community should be sufficient for users to reproduce your error. The input you used, the exact commands and their sequence, and the actions you performed, along with a detailed error log if that's available - these would get you help real fast. Also, when you follow this reproducibility process for errors, more often than not you'll end up solving it all by yourself.