I’ve a NEC - 3500 AG @ 2.18
Sometime when I’m burning a mini DVD-R (Dotcom//AML), this error occurs between 70 and 90% of wrinting ;(
sometimes reach the 100% without problems
I think that ins’t the media (this media works greats in other burnings) … but i try several things and nothing help me 
It’s a hardware problem? If I use Liggy and Dee firmware may resolve this problem?
Out of 3 burns… 2 appears this error and 1 the writing is perfect!
PS.: Is not the heat, i tested this too ^^’