I've tried converting main movie on several BD's to an MP4 suitable for playback on iPad etc. Every one I've tried so far seems to start off well, but then just stops after a few minutes and then the error screen pops up. I've sent the error logs to Elby. I've had the same issue with each release. Here are some log files. I'm using the iPad Air device with size of output set to 720x1280 and quality adjusted to give just under a 2GB file for a 2 hour movie.