It happens when I use a MakerBot with S3D. MakerBot the machine simply stopped as S3D's console suggested to check if the background service is running. I found out that its diagnose was right, it happened in the middle (30%) of a 20 hour print.
I tried using the MakerWare to do that but not able to do so. Anyone any suggestions other than have the Mini power down and up? I want to finish that 70% of print.