Have hunted around the net and not come across this specific problem, so maybe I'm the only one. Randomly and intermittently, a few minutes into a file play I can get a greenish blank screen and the message 'Cannot play this file' using the Zidoo internal player, up until now. If you return to the file, it will then play perfectly all night on any file you try, including the one it failed on first time. This is extremely intermittent, as you can play the same files every day, all day and it may happen just once in a week. At first I thought it was network dropout (NAS), changed from ethernet wired to wifi and it happened the following week once. So, put a totally different set of video and audio files on an HDD to put internally into the X20. Some days later, after playing the same files over and over with no problem, it happened again on the internal HDD. None of my files give me a reading problem on my Dune HD smart D1, Dune Duo 4k or my Oppo 203. I have checked any file that has failed to play right through, back on iMac with MediaInfo and BitrateViewer and not seen a problem with them. Also this is random and a different file each time, plus hitting play again, it will then play perfectly all night and is rock solid, even if you try and throw it by skipping back/forwards with no problem. Once it's errored once in a evening, it's perfect all night after that. For the first time in weeks, ZDMC also stopped playing an mp3 music file (no message) for no apparent reason. Most of my files are H264 MP4 HD, but it's now happened on an SD MPEG plus MP3 music, with no network involved at all. Even checked the mains power was OK, just in case. Strange!