[Hotfix 25.2]: Exclude pseudo/time step related columns when computing the average of forces

flow360/component/results/case_results.py

@@ -511,20 +511,19 @@ def include_time(self):
             )
 
         params = self._get_params_method()
-        if isinstance(params, Flow360Params):
+        if isinstance(params, SimulationParams):
             try:
-                step_size = params.time_stepping.time_step_size
+                step_size = params.time_stepping.step_size
             except KeyError:
                 raise ValueError(
-                    "Cannot find time step size for this simulation. Check flow360.json file."
+                    "Cannot find time step size for this simulation. Check simulation.json."
                 )
-
-        elif isinstance(params, SimulationParams):
+        elif isinstance(params, Flow360Params):
             try:
-                step_size = params.time_stepping.step_size
+                step_size = params.time_stepping.time_step_size
             except KeyError:
                 raise ValueError(
-                    "Cannot find time step size for this simulation. Check simulation.json."
+                    "Cannot find time step size for this simulation. Check flow360.json file."
                 )
         else:
             raise ValueError(
@@ -563,7 +562,12 @@ def _pseudo_step_masks(cls, df):
 
     @classmethod
     def _average_last_fraction(cls, df, average_fraction):
-        selected_fraction = df.tail(int(len(df) * average_fraction))
+        columns_filtered = [
+            col
+            for col in df.columns
+            if col not in [_PSEUDO_STEP, _PHYSICAL_STEP, _TIME, _TIME_UNITS]
+        ]
+        selected_fraction = df[columns_filtered].tail(int(len(df) * average_fraction))
         return selected_fraction.mean()
 
     def get_averages(self, average_fraction):