3ds Max :: MassFX Cloth Won't Bake

One long, thin plane linked at 90 degrees to a rotating cylinder to roll the plane up.Cylinder is kinematic, plane is mCloth with a single strip of verts connected to cylinder which rotates.

MassFX works. Bake all produces keyframes as a masterpoint controller on the mCloth modifier, BUT not as standard max keyframes in the planes transform controller...making it pretty unusable.Sometimes, bake all will end with an "unknown exception". After that, Max transforms are unstable - Moving an object with mouse is unpredictable until a restart.

Repeatable on both Windows XP and Windows 7 - Max 2013 32 and 64

Other features of MASSFX work eg standard rigid bodies etc - seems to relate only to clothOtherwise, any way of rolling up a cloth ribbon that is FIXED at both ends on to a cylinder, I may offer a prize!