What dose cant write end of disk at once mean?

i keep trying to write info on to a cd-r (datawrite 48x) and i get cant write end of disk at once every time? i have tryed it in my msi 48x16x48 and it gives me that message (this is in nero) and when i try to write to them in my plextor px-712a it just chucks them out half way through a burn?
i have wrote to these disks before with no probs on both my drives and ive chanced non of my drive settings?
can u help?

ps. i have tryed all speeds avalible!

Are you overburning? If so you need to configure Nero to do so and there is a limit it maybe too big.

If it’s not that, try updating the Windows ASPI drivers.