Maya to Motionbuilder Parent Constraints


So I’m sending a HumanIK rig over from Maya to Motionbuilder with added facial controls and joints along with it. Some of the facial joints are connected to the head rig through parent constraints to keep them in place. When sent to Motionbuilder, this constraint is lost, and any motion added to the rig moves everything except for the facial joints, which remain at their origin point. Is there any way to ensure that these constraints will stay when sent over to Motionbuilder or is there something I need to do specifically to do in mobu to get it to work? Any info is greatly appreciated.


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