diff --git a/src/Relationship.py b/src/Relationship.py
index c611a7f25..954e3acb7 100644
--- a/src/Relationship.py
+++ b/src/Relationship.py
@@ -1023,7 +1023,7 @@ class RelationshipCalculator(object):
                                 pmap, depth, stoprecursemap)
         except:
             import traceback
-            traceback.print_exc()
+            print(traceback.print_exc())
             return
 
     def collapse_relations(self, relations):