Hi Paul, thanks for sending the file. Yeah you’re just running out of memory here – 100 copies is too many to make of a NURBS object unless it is a bit lighter than that – having the little fillets on the object like you’ve got in this case adds a lot to the object’s data size.

Doing the array in your rendering program instead is probably a better bet.

Also if you reduce the display mesh density in MoI to make it a bit rougher that can help to reduce memory consumption, see here for which settings to adjust for that:
http://moi3d.com/forum/index.php?webtag=MOI&msg=4643.4

Thanks,
- Michael