TypeError: undefined is not a constructor (evaluating 'plane.projectz( moi.view.getCPlane().origin )')

dimhorizontal.js line 36

32: }
33:
34: function SetPlaneOrigin( plane )
35: {
36: >> var origin = plane.projectz( moi.view.getCPlane().origin );
37: return moi.vectorMath.createFrame( origin, plane.xaxis, plane.yaxis );
38: }
39:
40: function DoDimLinear( factoryname )