diff --git a/View/acoustic_data_tab.py b/View/acoustic_data_tab.py
index 6a6061e..5eb8a54 100644
--- a/View/acoustic_data_tab.py
+++ b/View/acoustic_data_tab.py
@@ -21,11 +21,18 @@
 # -*- coding: utf-8 -*-
 
 
-from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QHBoxLayout, QGroupBox, QPushButton, QComboBox, QLineEdit, QLabel,
-                             QGridLayout, QTableView, QSpacerItem, QSizePolicy, QFileDialog, QMessageBox, QScrollArea,
-                             QSlider, QMenu, QCheckBox)
+from PyQt5.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QGroupBox,
+    QPushButton, QComboBox, QLineEdit, QLabel,
+    QGridLayout, QTableView, QSpacerItem, QSizePolicy,
+    QFileDialog, QMessageBox, QScrollArea,
+    QSlider, QMenu, QCheckBox
+)
 from PyQt5.QtGui import QPixmap, QIcon
-from PyQt5.QtCore import Qt, QCoreApplication, pyqtSignal, QEvent, QSize, QPropertyAnimation
+from PyQt5.QtCore import (
+    Qt, QCoreApplication, pyqtSignal, QEvent, QSize,
+    QPropertyAnimation
+)
 
 import numpy as np
 import pandas as pd
@@ -35,7 +42,7 @@ from matplotlib.colors import LogNorm, CSS4_COLORS, BoundaryNorm
 from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
 from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolBar
 
-from os import path
+import os
 from copy import deepcopy
 import locale
 
@@ -1232,71 +1239,76 @@ class AcousticDataTab(QWidget):
                               self.combobox_frequency_information.currentIndex()]))
 
     def open_dialog_box(self):
+        abs_params = [
+            (None, None),
+            ("AQUAscat file", "Aquascat file (*.aqa)"),
+            ("UBSediFlow file", "UBSediFlow file (*.udt)"),
+        ]
 
-        # --- Open dialog box + choice directory and select file ---
-        if self.combobox_ABS_system_choice.currentIndex() == 0:
+
+        system = self.combobox_ABS_system_choice.currentIndex()
+
+        if system == 0:
             msgBox = QMessageBox()
             msgBox.setWindowTitle("Download Error")
             msgBox.setIcon(QMessageBox.Warning)
             msgBox.setText("Choose ABS system before download acoustic files")
             msgBox.setStandardButtons(QMessageBox.Ok)
             msgBox.exec()
-        elif self.combobox_ABS_system_choice.currentIndex() == 1:
+        else:
+            abs_name, abs_file_type = abs_params[system]
 
-            filename = QFileDialog.getOpenFileNames(self, "AQUAscat file",
-                                                   [stg.path_BS_raw_data[-1] if self.fileListWidget.count() > 0 else ""][0],
-                                                   "Aquascat file (*.aqa)",
-                                                    options=QFileDialog.DontUseNativeDialog)
+            filenames, _ = QFileDialog.getOpenFileNames(
+                self, abs_name,
+                [
+                    stg.path_BS_raw_data[-1]
+                    if self.fileListWidget.count() > 0
+                    else ""
+                ][0],
+                abs_file_type,
+                options=QFileDialog.DontUseNativeDialog
+            )
 
-            for n in filename[0]:
+            if len(filenames) == 0:
+                return
 
-                stg.path_BS_raw_data.append(path.dirname(n))
-                stg.filename_BS_raw_data.append(path.basename(n))
-                stg.data_preprocessed.append(path.basename(n))
+            for n in filenames:
+                stg.path_BS_raw_data.append(os.path.dirname(n))
+                stg.filename_BS_raw_data.append(os.path.basename(n))
+                stg.data_preprocessed.append(os.path.basename(n))
 
-        elif self.combobox_ABS_system_choice.currentIndex() == 2:
-            filename = QFileDialog.getOpenFileNames(self, "UBSediFlow file",
-                                                   [stg.path_BS_raw_data[-1] if self.fileListWidget.count() > 0 else ""][0],
-                                                   "UBSediFlow file (*.udt)",
-                                                   options=QFileDialog.DontUseNativeDialog)
-
-            for n in filename[0]:
-
-                stg.path_BS_raw_data.append(path.dirname(n))
-                stg.filename_BS_raw_data.append(path.basename(n))
-                stg.data_preprocessed.append(path.basename(n))
+            self.open_acoustic_data()
 
+    def open_acoustic_data(self):
         # --- Fill lineEdit with path and file names + load acoustic data ---
         # --- fill date, hour and measurements information + fill frequency combobox for bottom detection ---
-        if self.combobox_ABS_system_choice.currentIndex() != 0:
-
+        system = self.combobox_ABS_system_choice.currentIndex()
+        if system != 0:
             try:
-
                 self.load_BS_acoustic_raw_data()
-
             except ValueError as e:
-
                 msgBox = QMessageBox()
                 msgBox.setWindowTitle("Download Error")
                 msgBox.setIcon(QMessageBox.Warning)
                 msgBox.setText("Please select a file")
                 msgBox.setStandardButtons(QMessageBox.Ok)
                 msgBox.exec()
-
             else:
-
                 if self.fileListWidget.count() == 0:
-
-                    for p, f in zip(stg.path_BS_raw_data, stg.filename_BS_raw_data):
+                    for p, f in zip(stg.path_BS_raw_data,
+                                    stg.filename_BS_raw_data):
                         self.fileListWidget.addFilenames([f])
                         self.fileListWidget.setToolTip(p)
-
                 else:
-
-                    for k in range(self.fileListWidget.count(), len(stg.filename_BS_raw_data), 1):
-                        self.fileListWidget.addFilenames([stg.filename_BS_raw_data[k]])
-                        self.fileListWidget.setToolTip(stg.path_BS_raw_data[k])
-
+                    for k in range(self.fileListWidget.count(),
+                                   len(stg.filename_BS_raw_data),
+                                   1):
+                        self.fileListWidget.addFilenames(
+                            [stg.filename_BS_raw_data[k]]
+                        )
+                        self.fileListWidget.setToolTip(
+                            stg.path_BS_raw_data[k]
+                        )
 
                 self.fill_measurements_information_groupbox()
                 self.fill_table()
@@ -1304,7 +1316,11 @@ class AcousticDataTab(QWidget):
                 self.update_frequency_combobox()
                 self.water_attenuation()
 
-                stg.acoustic_data = list(range(self.fileListWidget.count()))
+                stg.acoustic_data = list(
+                    range(
+                        self.fileListWidget.count()
+                    )
+                )
 
     def rename_file_in_ListWidget(self, event):
 
@@ -2719,4 +2735,3 @@ class AcousticDataTab(QWidget):
                         self.update_plot_profile()
 
                     self.fig_BS.canvas.draw_idle()
-