I am using CloneDVD to rip to hard disk, just copying the main feature, and then intended to use CloneDVDmobile to convert to MP4 so that I can watch some titles when comuting. However, although CloneDVD works great and I am very happy with it, I can only transcode a few of the copied films. Most of the titles give one of these errors when opened in CloneDVDmobile: DVDManager 5 1 invalid BlockType or unexpected error Please be sure that all input files are available and that they represent a properly mastered DVD. If the error persists, please send an error description to support at email@example.com [NavigationPack 6 1 60 61 VOBU 4 1 60 PictureReader] Can anyone help with this? Regards, Colin.