diff --git a/activitysim/core/interaction_simulate.py b/activitysim/core/interaction_simulate.py
index 3da309369..f1ae6e7ea 100644
--- a/activitysim/core/interaction_simulate.py
+++ b/activitysim/core/interaction_simulate.py
@@ -417,7 +417,7 @@ def to_series(x):
                 ),
                 dtype=np.float32,
             )
-            sh_utility_fat = sh_utility_fat[trace_rows, :]
+            # sh_utility_fat = sh_utility_fat[trace_rows, :]
             sh_utility_fat = sh_utility_fat.to_dataframe("vals")
             try:
                 sh_utility_fat = sh_utility_fat.unstack("expressions")