"internal software error ... /BlockPlanner.cpp, line 217"

Hello all.

Been trying to burn an Encore slideshow to DVD for the last 24 hours. Keep getting this error window: “internal software error… /(then a long string of directories) …/BlockPlanner.cpp, line 217”. Same message when trying to write to a DVD folder instead of a disc.

What does this mean, and how can I fix it?

Flowchart: simple non-motion menu, one button, plays one slideshow (about 5 minutes) with 94 images, then a second slideshow (about 6 minutes) with 96 images, then return to the menu. All are jpg images, random pan and zoom, scale and crop edges, cross dissolves. Music with both slideshows (WAV files, both have been transcoded), slideshows are fit to audio duration. Preview Play works great. Check Project shows no problems.

Tried an earlier, simple Encore slideshow (about 12 images) fit to music duration and it burned okay.

Mac Pro, Snow Leopard, 12 cores, 24 gigs RAM, Adobe Production Premium CS 5.5.

Not much hair left…