diff --git a/src/cr/cube/cubepart.py b/src/cr/cube/cubepart.py
index d0ccc2aa6..52e4b69bd 100644
--- a/src/cr/cube/cubepart.py
+++ b/src/cr/cube/cubepart.py
@@ -714,6 +714,15 @@ class _Nub(object):
     def __init__(self, cube):
         self._cube = cube
 
+    @lazyproperty
+    def dimension_types(self):
+        """Sequence of `cr.cube.enum.DIMENSION_TYPE` member for each dimension.
+
+        Length zero in this case.
+        """
+        # TODO: remove need for this in exporter
+        return ()
+
     @lazyproperty
     def means(self):
         return self._scalar.means
diff --git a/src/cr/cube/stripe.py b/src/cr/cube/stripe.py
index 33776833d..a8937a4d3 100644
--- a/src/cr/cube/stripe.py
+++ b/src/cr/cube/stripe.py
@@ -297,6 +297,11 @@ def base_value(self):
     def count(self):
         return sum(row.count for row in self._addend_rows)
 
+    @lazyproperty
+    def fill(self):
+        """An insertion row can have no element-fill-color transform."""
+        return None
+
     @lazyproperty
     def hidden(self):
         """True if subtotal is pruned. Unconditionally False for stripe subtotal row."""