diff --git a/View/acoustic_inversion_tab.py b/View/acoustic_inversion_tab.py
index f702ede..ec13ce3 100644
--- a/View/acoustic_inversion_tab.py
+++ b/View/acoustic_inversion_tab.py
@@ -23,6 +23,7 @@
 import os
 import numpy as np
 import pandas as pd
+from math import isinf
 
 from copy import deepcopy
 
@@ -398,6 +399,16 @@ class AcousticInversionTab(QWidget):
             msgBox.setStandardButtons(QMessageBox.Ok)
             msgBox.exec()
 
+        elif  isinf(stg.alpha_s[0]) or isinf(stg.alpha_s[1]):
+
+            msgBox = QMessageBox()
+            msgBox.setWindowTitle("Alpha computation error")
+            msgBox.setIconPixmap(
+                QPixmap(self.path_icon + "no_approved.png").scaledToHeight(32, Qt.SmoothTransformation))
+            msgBox.setText("Sediment sound attenuation is infinite !")
+            msgBox.setStandardButtons(QMessageBox.Ok)
+            msgBox.exec()
+
         else:
 
             self.compute_VBI()
diff --git a/View/sediment_calibration_tab.py b/View/sediment_calibration_tab.py
index d1575a8..838dea4 100644
--- a/View/sediment_calibration_tab.py
+++ b/View/sediment_calibration_tab.py
@@ -27,6 +27,7 @@ from scipy.stats import linregress
 
 import numpy as np
 import pandas as pd
+from math import isinf
 
 import matplotlib.pyplot as plt
 from matplotlib.colors import LogNorm
@@ -2246,6 +2247,16 @@ class SedimentCalibrationTab(QWidget):
             msgBox.setStandardButtons(QMessageBox.Ok)
             msgBox.exec()
 
+        elif isinf(alpha_s_freq1) or isinf(alpha_s_freq2):
+
+            msgBox = QMessageBox()
+            msgBox.setWindowTitle("Alpha computation error")
+            msgBox.setIconPixmap(
+                QPixmap(self._path_icon("no_approved.png")).scaledToHeight(32, Qt.SmoothTransformation))
+            msgBox.setText("Sediment sound attenuation is infinite !")
+            msgBox.setStandardButtons(QMessageBox.Ok)
+            msgBox.exec()
+
         else:
 
             msgBox = QMessageBox()