Compilation for DVD message

I’m converting and burning a downloaded movie to DVD. I have done this many times but now get a message saying that the compilation will not fit on the disk, but the movie is not a compilation just one movie. I uninstalled Nero 7 and reinstalled and it worked OK for a couple of movies, including the one I had the problem with. Now it is happening again, unisntaleld and reinstalled again but still happening. I tried 2 different media, both have converted and burned OK before. As I’m not that familiar with Nero, maybe I’m doing something wrong.

This is the message that I get:
There is not enough space to burn this compilation onto this disc. Please insert another disc that privides more space.

supposed to read ‘provides’ not privides