You must create a Custom rig mapping for your character to source animation streaming from MotionBuilder or from a local HumanIK character within Maya.
To create a new Custom rig mapping
 > Define > Custom Rig.
 > Define > Custom Rig. 
                   from the Definition tab toolbar.
 from the Definition tab toolbar. 
                   -click the corresponding cell in the Custom Rig tab and select Assign Selected Effector from the menu that appears. Once you have defined a cell, it becomes green to indicate it has been mapped.
-click the corresponding cell in the Custom Rig tab and select Assign Selected Effector from the menu that appears. Once you have defined a cell, it becomes green to indicate it has been mapped. 
               By default, IK effectors map translations and rotations and FK effectors only map rotations.
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               Your Custom rig mapping is stored in an XML file that can be loaded, using the Load Custom Rig Mapping icon  , and re-used at a later date. Saving your Custom rig mapping lets you create templates for your Custom rigs.
, and re-used at a later date. Saving your Custom rig mapping lets you create templates for your Custom rigs. 
               
To save a Custom rig mapping with a scene
Your character loads with its custom rig mapping still properly applied.
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
 Except where otherwise noted, this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License