fix non existing bone

picker.py

@@ -372,12 +372,16 @@ class Picker:
                 )
 
             elif s['type'] == 'BONE':
+                bone = rig.pose.bones.get(s['bone'])
+                if not bone:
+                    print(f'Bone {s["bone"]} not exist')
+                    continue
                 shape = BoneShape(
                     self, 
                     points=s['points'], 
                     polygons=s['polygons'], 
                     edges=s['edges'], 
-                    bone=rig.pose.bones.get(s['bone']), 
+                    bone=bone, 
                     color=s['color']
                 )
 
@@ -527,7 +531,8 @@ def draw_callback_view():
         return
 
     if ob not in PICKERS:
-        picker_path = Path(bpy.path.abspath(ob.data.rig_picker.source))
+        picker_path = Path(bpy.path.abspath(ob.data.rig_picker.source, library=ob.data.library))
+        print('Load picker from', picker_path.resolve())
         picker_datas = json.loads(picker_path.read_text())
         #shapes = [s.to_dict() for s in ob.data.rig_picker['shapes']]
         PICKERS[ob] = Picker(ob, shapes=picker_datas)