I think you are using CopyToDVD!?
I got this message too, but donÂ´t be afraid it is a faulty media.
I bought Vivastar 1x and there have been 8 out of 30 Disc with this fault.
In Nero it says "medium error".
Try using RitekG3, Maxell, Princo but donÂ´t use Vivastar.
ThatÂ´s my personal opinion.