Why does some assemblies have missing parts and others don't when I am doing an Animation\Render?

If I don't render it the result is fine,

when I do render it the main assembly I am trying to render looks like this:

What your seeing the first part of the entire assembly the rest of the parts are missing, Nearly 30+ parts and sub-assemblies are missing.

This makes no sense what so ever. I have tried doing it as a series of images and as an AVI with the MS codec and Techsmith's Codec and I still get the same result every time. I even went as far as downloading the 30 day trail of Modo and export my render to an *.lxo file. The result there was worse than what I have already.

I have read some other posts, but I have not seen anything for 2015 sp4, nor did I see a solution that corresponded to the menu's I am seeing.

I am supposed to have this done Monday Sept 28th... but with this nasty (BUG) I am afraid its not going to happen.

Any suggestions anyone else has found??