Update logsums.py to only evaluate nesting coefficients if the logsum…

…s are being calculated with a nested logit model
SANDAG · Nov 7, 2024 · c6f5b56 · c6f5b56
1 parent 3d255d0
commit c6f5b56
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/activitysim/abm/models/util/logsums.py b/activitysim/abm/models/util/logsums.py
@@ -167,7 +167,8 @@ def compute_location_choice_logsums(
     )
 
     nest_spec = config.get_logit_model_settings(logsum_settings)
-    nest_spec = simulate.eval_nest_coefficients(nest_spec, coefficients, trace_label)
+    if nest_spec is not None: # nest_spec is None for MNL
+        nest_spec = simulate.eval_nest_coefficients(nest_spec, coefficients, trace_label)
 
     locals_dict = {}
     # model_constants can appear in expressions