- group_index_map = dict((i, i) for i in range(len(objs[0].vertex_groups)))
- if objs[0].parent and objs[0].parent.type=="ARMATURE":
- armature = objs[0].parent.data
+ first_obj = objs[0][0]
+ group_index_map = dict((i, i) for i in range(len(first_obj.vertex_groups)))
+ if first_obj.parent and first_obj.parent.type=="ARMATURE":
+ armature = first_obj.parent.data