diff --git a/activitysim/abm/models/joint_tour_destination.py b/activitysim/abm/models/joint_tour_destination.py
index e10fa2c34..8e7c940db 100644
--- a/activitysim/abm/models/joint_tour_destination.py
+++ b/activitysim/abm/models/joint_tour_destination.py
@@ -326,8 +326,8 @@ def joint_tour_destination(
     person that's making the tour)
     """
 
-    trace_label = 'non_mandatory_tour_destination'
-    model_settings_file_name = 'non_mandatory_tour_destination.yaml'
+    trace_label = 'joint_tour_destination'
+    model_settings_file_name = 'joint_tour_destination.yaml'
     model_settings = config.read_model_settings(model_settings_file_name)
 
     logsum_column_name = model_settings.get('DEST_CHOICE_LOGSUM_COLUMN_NAME')
diff --git a/activitysim/abm/models/util/vectorize_tour_scheduling.py b/activitysim/abm/models/util/vectorize_tour_scheduling.py
index bd0eee021..f71e45b24 100644
--- a/activitysim/abm/models/util/vectorize_tour_scheduling.py
+++ b/activitysim/abm/models/util/vectorize_tour_scheduling.py
@@ -76,6 +76,10 @@ def _compute_logsums(alt_tdd, tours_merged, tour_purpose, model_settings, trace_
     locals_dict.update(constants)
     locals_dict.update(skims)
 
+    # constrained coefficients can appear in expressions
+    coefficients = simulate.get_segment_coefficients(logsum_settings, tour_purpose)
+    locals_dict.update(coefficients)
+
     # - run preprocessor to annotate choosers
     # allow specification of alternate preprocessor for nontour choosers
     preprocessor = model_settings.get('LOGSUM_PREPROCESSOR', 'preprocessor')
@@ -92,17 +96,12 @@ def _compute_logsums(alt_tdd, tours_merged, tour_purpose, model_settings, trace_
             trace_label=trace_label)
 
     # - compute logsums
-
-    coefficients = simulate.get_segment_coefficients(logsum_settings, tour_purpose)
     logsum_spec = simulate.read_model_spec(file_name=logsum_settings['SPEC'])
     logsum_spec = simulate.eval_coefficients(logsum_spec, coefficients, estimator=None)
 
     nest_spec = config.get_logit_model_settings(logsum_settings)
     nest_spec = simulate.eval_nest_coefficients(nest_spec, coefficients)
 
-    # constrained coefficients can appear in expressions
-    locals_dict.update(coefficients)
-
     logsums = simulate.simple_simulate_logsums(
         choosers,
         logsum_spec,
diff --git a/activitysim/core/simulate.py b/activitysim/core/simulate.py
index 9e8af50df..cb8fc6494 100644
--- a/activitysim/core/simulate.py
+++ b/activitysim/core/simulate.py
@@ -140,7 +140,11 @@ def read_model_coefficients(model_settings=None, file_name=None):
         file_name = model_settings['COEFFICIENTS']
 
     file_path = config.config_file_path(file_name)
-    coefficients = pd.read_csv(file_path, comment='#', index_col='coefficient_name')
+    try:
+        coefficients = pd.read_csv(file_path, comment='#', index_col='coefficient_name')
+    except ValueError:
+        logger.exception("Coefficient File Invalid: %s" % str(file_path))
+        raise
 
     return coefficients
 
@@ -188,7 +192,11 @@ def read_model_coefficient_template(model_settings):
     coeffs_file_name = model_settings['COEFFICIENT_TEMPLATE']
 
     file_path = config.config_file_path(coeffs_file_name)
-    template = pd.read_csv(file_path, comment='#', index_col='coefficient_name')
+    try:
+        template = pd.read_csv(file_path, comment='#', index_col='coefficient_name')
+    except ValueError:
+        logger.exception("Coefficient Template File Invalid: %s" % str(file_path))
+        raise
 
     # by convention, an empty cell in the template indicates that
     # the coefficient name should be propogated to across all segments
diff --git a/activitysim/examples/example_mtc/configs/joint_tour_destination.yaml b/activitysim/examples/example_mtc/configs/joint_tour_destination.yaml
index 36d67bc30..a9cb3fe43 100644
--- a/activitysim/examples/example_mtc/configs/joint_tour_destination.yaml
+++ b/activitysim/examples/example_mtc/configs/joint_tour_destination.yaml
@@ -10,13 +10,15 @@ SEGMENTS:
   - eatout
   - social
 
-
 SAMPLE_SIZE: 30
 
+# we can't use use household income_segment as this will also be set for non-workers
+CHOOSER_SEGMENT_COLUMN_NAME: tour_type
+
 SIMULATE_CHOOSER_COLUMNS:
   - tour_type
   - TAZ
-  - household_id
+  - person_id
 
 LOGSUM_SETTINGS: tour_mode_choice.yaml
 
diff --git a/activitysim/examples/example_mtc/configs/non_mandatory_tour_destination_coeffs.csv b/activitysim/examples/example_mtc/configs/non_mandatory_tour_destination_coeffs.csv
index bf02b811f..4096d6e3a 100644
--- a/activitysim/examples/example_mtc/configs/non_mandatory_tour_destination_coeffs.csv
+++ b/activitysim/examples/example_mtc/configs/non_mandatory_tour_destination_coeffs.csv
@@ -3,7 +3,7 @@ coef_mode_logsum,0.6755,F
 coef_escort_dist_0_2,-0.1499,F
 coef_eatout_dist_0_2,-0.5609,F
 coef_eatout_social_0_2,-0.5609,F
-coef_eatout_dist_0_2,-0.7841,F
+#coef_eatout_dist_0_2,-0.7841,F
 coef_othdiscr_dist_0_2,-0.1677,F
 coef_escort_dist_2_5,-0.8671,F
 coef_shopping_dist_2_5,-0.5655,F