I have a similar problem when batch publishing to DWF ePlot. The program crashes when attempting to publish the last sheet and no DWF is produced (I have it set up not to background print but to actually show the progress in a window).
I have posted my thread at:
http://discussion.autodesk.com/forums/thread.jspa?threadID=758138&tstart=0
However, if I batch publish "DWF to PDF" (which is setup in all layouts), the PDF is generated, but the program still crashes. I have not found a solution to the DWF except publishing every sheet separately - yes it is a pain, but that is the only way it works on my computer....
I have ACAD C3D 2010 on a Win7 ult, 4GB RAM machine.