diff --git a/FlowMeters/DoubleElbow/Ultrasonic_diametral_1_30_alt.npz b/FlowMeters/DoubleElbow/Ultrasonic_diametral_1_30_alt.npz
deleted file mode 100644
index d8ca1ef8a08ec56a9ef856f1ca6e5d71a5d49149..0000000000000000000000000000000000000000
Binary files a/FlowMeters/DoubleElbow/Ultrasonic_diametral_1_30_alt.npz and /dev/null differ
diff --git a/FlowMeters/DoubleElbow/Ultrasonic_diametral_1_30_ref.npz b/FlowMeters/DoubleElbow/Ultrasonic_diametral_1_30_ref.npz
deleted file mode 100644
index 088834358aed6ec10f1f4b9a901234145a783446..0000000000000000000000000000000000000000
Binary files a/FlowMeters/DoubleElbow/Ultrasonic_diametral_1_30_ref.npz and /dev/null differ
diff --git a/GUI_Elbow.py b/GUI_Elbow.py
index 8026169487ee997191bf9985ada11c8c99274207..1ba9de5bd04ac4e5c1972e113ba1b95c1e472471 100644
--- a/GUI_Elbow.py
+++ b/GUI_Elbow.py
@@ -445,9 +445,9 @@ class mainPanel(wx.Panel):
             print("try to load the flow meter")
             self.pathint   = np.load("./FlowMeters/"+flow.case + "/" + fm.name+".npz",allow_pickle=True)["pathint"]
             if flow.case == "SingleElbow":
-                self.regint_fm    = interpol.RegularGridInterpolator((flow.Rk,flow.dist,flow.phi[:,0]),self.pathint,method = "cubic",bounds_error = False,fill_value=None)
+                self.regint_fm    = interpol.RegularGridInterpolator((flow.Rk,flow.dist,flow.phi[:,0]),self.pathint,method = "linear",bounds_error = False,fill_value=None)
             else: 
-                self.regint_fm    = interpol.RegularGridInterpolator((flow.Rk,flow.dl,flow.dist,flow.phi[:,0]),self.pathint,method = "cubic",bounds_error = False,fill_value=None)
+                self.regint_fm    = interpol.RegularGridInterpolator((flow.Rk,flow.dl,flow.dist,flow.phi[:,0]),self.pathint,method = "linear",bounds_error = False,fill_value=None)
             print("Flow meter successfully loaded from file")
             return 1
         except Exception as e: