error at lead out

when i burn it goes to 100% and then when its writing the lead out it says "Logical unit not ready, operation in progress" and "Could not perform end of Disc-at-once" and "Could not perform EndSession" the burn then fails. i have been trying to use rw discs to prevent the possible coaster but it has made two coasters out of rws. i cannt erase them or nothin. When the disc is in it slows every thing down dramatically. and it wont read the rw or let me do anything with it. any help would be appriciated

 

are you burning all the way to the end of the disc (might not have enough room to write lead out)?

 

I'll try that in a few days. when i have some more time