[Debug Point] @Face(faceClass) operation - TheOpenCloudEngine/metaworks GitHub Wiki
Firstly turn on the metaworks.js debug mode in the chrome debugger:
mw3.debugMode=true
Check whether the object returned from the server has face property:
__className: "abc.Class"
_face_: Object
__className: "abc.face.FaceClass"
...
If there are no face property debug on MetaworksConverter.java and Find Usages on "face"
If there face property exists, but the value of that is not property, then check your Face class's implementation (especially setValueToFace()).