I tried the latest release and again can not load any of my tracks in DevMode due to "Could not find TDF definition for material: Armco" and 100+ notifications of every texture in the game. I have had an answer from Alex, but do not understand. Hopefully he will reply, but if someone here can help, I would appreciate it. Since the last and this update, I get that message. I hope it is a simple fix, but I do not know where to look. I have been doing my tracks from since 2009 and these last few updates are too much with all that has happened in the last few months. Here are his replies if someone can flesh these out....I have no idea where to look to fix the issue. "No sorry , you need to fix your content. You can press ok and load the track. You have content errors and HAT tags on either in appropriate surfaces or you need to add those materials to the tdf file" "HAT Target = driveable surface. If it is a driveable surface it should have a TDF file definition. So either you need to add entries to the TDF file for your surfaces or you need to remove the HAT Target tags from the objects"