Did it specify any reasons why the error happened? Sometimes long file names (especially html pages which are named horribly) are the cause of the same. If so rename those files with shorter names and re-burn your matter. There was a limit if I remember clearly of 126 characters but i'm not sure i need to check on this.
Another reason could also be that your burner could be the cause of the trouble, can you burn another DVD without the matter that was giving errors or completely different matter and check if you face the same problem.
Also was your media clean as in was the surface that matter gets burned on to scratched or damaged in anyway.
There could be several reasons so more inputs from you would help to solve this issue.