Crash corrected if any calibration file is selected (Click Cancel)

View/sediment_calibration_tab.py

@@ -1771,6 +1771,10 @@ class SedimentCalibrationTab(QWidget):
             msgBox.setStandardButtons(QMessageBox.Ok)
             msgBox.exec()
 
+        elif stg.filename_calibration_file == "":
+
+            pass
+
         else:
 
             # --- Read calibration file ---