Still no luck. I tried a previously created project and it now no longer burns. I created an iso and was able to burn that with Nero so it looks like it is definitely software. I’m using a custom theme and might have screwed something up when I deleted a temp directory and some old files that I thought were no longer use. I might try to reinstall DVD Architect. At least now I found a way to burn sucessfully and stop creating coasters. Thanks for your help