BluRay burns in DVDSP hanging, no obvious reason

FCS-3, FCP7

I used to be able to select the timeline, hit "Share", and burn to Blu-Ray. Now, when I try this, it acts like it's working, then bogs down with the countdown saying it has five seconds or so left. The barber pole progress bar just runs and runs, elapsed time counter stops and no further progress is made.

What should I look for in terms of trouble-shooting this?

I have also imported the same footage into DVDSP and asked for a BluRay. It tells me once I choose HD, I can't go back to SD, and that's fine, the source footage is HD. Then DVDSP has the same issue as "share" did. Plus, it tells me the BD media is no good. If I put a SD DVD in, it will ignore it's programming and burn a lovely SD DVD from the HD content... ?


Burning a SD DVD to normal DVD-R stock does work using share, even on the BD drive.


Media is OK. BD-Burner Drive is definitely selected.

The build is directed to save to a folder in my video drive, and there's plenty of room.

I'm not trying to make any menus or anything, just a simple burn of the HD file to BD.