Fix cases where '3ALPHA' not found for given TIPLOC

src/train_detail.py

@@ -60,8 +60,10 @@ def create_crs_list_from_stops(stops):
     for stop in stops:
         if not stop['isPublic']:
             continue
-
+        try:
             loc_ref = ob_client.get_loc_ref_codes_by_tiploc(stop['tiploc'])
-
             crs_list.append(loc_ref[0]['3ALPHA'])
+        except Exception as e:
+            print("Unable to load 3ALPHA for: ", stop['tiploc'])
+            crs_list.append("---")
     return crs_list