See if this helps.
Type AMBOM and expand all the sub assembles. Then try again.
You may have to go to each sub and create a BOM also if that doesn't work.
--
Jason Rhymes
3D Solid Power Toys
Multi Solid Stretch
http://www.acadianagraphics.com"Barry1Lau" wrote in message news:6271270@discussion.autodesk.com...
MDT 2008 SP2
When trying to balloon a medium sized assembly with several external
referece parts and some small external reference sub-assemblies, the
individual parts balloon okay but the subs do not. The subs lack the BOM
part marker to select. It seems like I have been able to balloon subs in
the past but it is not working now.