I am using AnyDVD HD version 18.104.22.168 and on some Blu-ray rips (ripped to hard drive) I get the following error with PowerDVD (version 7.3.3104a): It has happened on various Blu-ray titles, new and old (but has not happened on a single HD-DVD). Re-installed PowerDVD but the error continues. Any ideas what this could be? Some suspicions are either a corrupt file structure but the structure appears OK. The actual media files are fine as they play fine with MPC or manually through PowerDVD. And no, my drive is not open.