For what it's worth, I just received the same error under similar circumstances.
The export has been stopped because " is almost full (<1 MB free disk space)!
24.8GB free on a 500GB SATA2 drive.
Aux files are at C:\Documents and Settings\All Users\Application Data\Studio 12\Data.
The avi file is on a RAID5 2TB volume with > 1.2 TB free.
The video was a 7 minute 20 second avi with "Special Events - Wedding 1 Main.dtl" as a menu and simple 10 second "dissolve" transitions between clips.
The computer is a relatively fresh complete reload (5 weeks) with XP Pro and Studio 12.1.3.6605. This is the second time I have received this error on this machine, but I didn't keep detailed notes on the previous instance - I thought it was a fluke. It is an annoyance rather than a problem at this point because just as Kenneth_L writes, it created the content and burned the DVD successfully. This is the second time it has happened on this machine,I know it sounds crazy, but my first thought was that it had gone out to the writer as soon as the DVD was finalized and saw no space on the disc.....and promptly told me so.
bsdennis
XP Pro-SP3
Intel 915GB MB
Intel P4 3.2 GHz
4 GB Ram
2 x 500GB SATA2
4 x 1.5 TB SATA2 as 2ea-2TB volumes
NVIDIA GeForce 8800GT - 540MB onboard