diff --git a/View/sediment_calibration_tab.py b/View/sediment_calibration_tab.py
index 63adf79..a313ef8 100644
--- a/View/sediment_calibration_tab.py
+++ b/View/sediment_calibration_tab.py
@@ -2414,6 +2414,10 @@ class SedimentCalibrationTab(QWidget):
         data_id = self.combobox_acoustic_data_choice.currentIndex()
         fcb_id = self.combobox_frequency_FCB.currentIndex()
 
+        if (self.lineEdit_FCB_from.text() == ''
+            or self.lineEdit_FCB_to.text() == ''):
+            return
+
         self.update_plot_FCB()
 
         if stg.FCB.shape == (0,):
@@ -2437,8 +2441,7 @@ class SedimentCalibrationTab(QWidget):
             np.round(
                 np.abs(
                     x - float(
-                        self.lineEdit_FCB_from\
-                            .text().replace(',','.')
+                        self.lineEdit_FCB_from.text().replace(',','.')
                     )
                 ), 2
             ) == np.min(