diff --git a/funtofem/model/body.py b/funtofem/model/body.py
index f5451c27..5efa75b6 100644
--- a/funtofem/model/body.py
+++ b/funtofem/model/body.py
@@ -1778,7 +1778,10 @@ def _distribute_struct_loads(
                         "load": entry["load"],
                         "hflux": entry["hflux"],
                     }
-
+                    
+            if self.struct_id is None:
+                return
+            
             for ind, struct_id in enumerate(self.struct_id):
                 if include_elastic:
                     self._fixed_struct_loads[scenario_id][3 * ind : 3 * ind + 3] = (