diff --git a/View/sediment_calibration_tab.py b/View/sediment_calibration_tab.py
index 658e135..f6bea34 100644
--- a/View/sediment_calibration_tab.py
+++ b/View/sediment_calibration_tab.py
@@ -1606,7 +1606,7 @@ class SedimentCalibrationTab(QWidget):
             for k in stg.fine_sample_profile
         ]
 
-        r_bottom = stg.depth_bottom[data_choice][
+        r_bottom = [stg.depth_bottom[data_choice][
             np.where(
                 np.abs(
                     time_data[data_choice][
@@ -1621,7 +1621,7 @@ class SedimentCalibrationTab(QWidget):
                         - stg.time_fine[stg.fine_sample_profile[-1][1]])
                 )
             )[0][0]
-        ]
+        ] if len(stg.depth_bottom[data_choice])!=0 else np.array([])][0]
 
         logger.debug(
             "call 'inv_hc.M_profile_SCC_fine_interpolated' params:"