Sorry, I removed that because I started to doubt myself
(and am ATM physically unwell, which obviously impeded my clear thinking

).
The lack of written documentation for MOM also made me
somewhat uncertain if I followed the correct procedure.
So I mistakenly removed the post. Sorry!!!
FYI - The post xsisupport refers to here was one of mine complaining
that dragging a MOM Init RigidBodies node into an existing ICE Tree
(even before connecting it) crashes SI2011.5.
Thanks for testing it & confirming this doesn't just happen here,
I also found out an alternative solution to the one you mention:
creating a "Momentum ground" before anything else
seems to prevent the crash from occurring.
Thanks, xsisupport, as always!
