If Bob tries to generate WorkOrders and there are none to generate, that needs to be at least a warning (as here). Maybe raise in teh future.

nucypher/characters/lawful.py

@@ -619,6 +619,9 @@ class Bob(Character):
             if num_ursulas == len(generated_work_orders):
                 break
 
+        if generated_work_orders == OrderedDict():
+            self.log.war("No new WorkOrders created.  Try calling this with different parameters.")  # TODO: Clearer instructions.
+
         return generated_work_orders
 
     def get_reencrypted_cfrags(self, work_order):