Fix bug where you couldn't duplicate text annotations.

src/blenderbim/blenderbim/core/root.py

@@ -32,6 +32,7 @@ def copy_class(ifc, collector, geometry, root, obj=None):
         root.copy_representation(element, new)
         new_representation = root.get_element_representation(new, root.get_representation_context(representation))
         data = geometry.duplicate_object_data(obj)
+        if data:
             geometry.change_object_data(obj, data, is_global=True)
             geometry.rename_object(data, geometry.get_representation_name(new_representation))
             geometry.link(new_representation, data)

src/blenderbim/blenderbim/tool/geometry.py

@@ -72,6 +72,7 @@ class Geometry(blenderbim.core.tool.Geometry):
 
     @classmethod
     def duplicate_object_data(cls, obj):
+        if obj.data:
             return obj.data.copy()
 
     @classmethod