diff --git a/src/Model/Geometry/Profile.py b/src/Model/Geometry/Profile.py
index 4a1f5a5fc1db371f3c9c2dc7d7f0b9ca827effee..b0328f80b6e8ad41ad5f83d67b9add7d0af11dee 100644
--- a/src/Model/Geometry/Profile.py
+++ b/src/Model/Geometry/Profile.py
@@ -1,10 +1,14 @@
 # -*- coding: utf-8 -*-
 
+import logging
+
 from tools import timer
 
 from Model.Geometry.Point import Point
 from Model.Except import NotImplementedMethodeError
 
+logger = logging.getLogger()
+
 class Profile(object):
     _id_cnt = 0
 
@@ -241,7 +245,7 @@ class Profile(object):
     @timer
     def sort_with_indexes(self, indexes: list):
         if len(self._points) != len(indexes):
-            print("TODO: CRITICAL ERROR!")
+            logger.critical("Indexes list do not correspond to point list")
 
         self._points = list(
             map(
diff --git a/src/Model/Geometry/Reach.py b/src/Model/Geometry/Reach.py
index fa72c8ec7cd386527b76503b24a9eea640a2280f..1f429be72f204978a78f09b2be5496adbdc3aaf8 100644
--- a/src/Model/Geometry/Reach.py
+++ b/src/Model/Geometry/Reach.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import logging
 import numpy as np
 
 from time import time
@@ -17,6 +18,8 @@ from Model.Geometry.ProfileXYZ import ProfileXYZ
 
 from Model.Except import FileFormatError, exception_message_box
 
+logger = logging.getLogger()
+
 class Reach(SQLSubModel):
     _sub_classes = [
         ProfileXYZ,
@@ -377,7 +380,7 @@ class Reach(SQLSubModel):
     @timer
     def sort_with_indexes(self, indexes: list):
         if len(self._profiles) != len(indexes):
-            print("TODO: CRITICAL ERROR!")
+            logger.critical("Indexes list do not correspond to profile list")
 
         self._profiles = list(
             map(
@@ -424,10 +427,10 @@ class Reach(SQLSubModel):
 
                 self._status.modified()
         except FileNotFoundError as e:
-            print(e)
+            logger.error(e)
             exception_message_box(e)
         except FileFormatError as e:
-            print(e)
+            logger.error(e)
             e.alert()
 
     @timer
diff --git a/src/View/ASubWindow.py b/src/View/ASubWindow.py
index 5bf0940ca66d07f3c12b5537dae6d74f5e4a487c..13719d77635b2725fb541c2ad1184a3d72bd6233 100644
--- a/src/View/ASubWindow.py
+++ b/src/View/ASubWindow.py
@@ -2,6 +2,7 @@
 
 import os
 import csv
+import logging
 
 from io import StringIO
 from datetime import datetime
@@ -26,6 +27,8 @@ from PyQt5.uic import loadUi
 
 from Model.Except import ClipboardFormatError
 
+logger = logging.getLogger()
+
 class WindowToolKit(object):
     def __init__(self, parent=None):
         super(WindowToolKit, self).__init__()
@@ -140,7 +143,7 @@ class ASubWindowFeatures(object):
         try:
             self.find(QLineEdit, name).setText(text)
         except AttributeError as e:
-            print(e)
+            logger.error(e)
 
     def get_line_edit_text(self, name:str):
         """Get text of line edit component
diff --git a/src/View/CheckList/Window.py b/src/View/CheckList/Window.py
index 8f720e0f92032d1265fe11aa0355f19d0accdc20..d04c89138eff314ba58181c2e316b3d1168a1137 100644
--- a/src/View/CheckList/Window.py
+++ b/src/View/CheckList/Window.py
@@ -169,7 +169,6 @@ class CheckListWindow(ASubMainWindow, ListedSubWindow):
         self.close()
 
     def reject(self):
-        print("cancel")
         self.end()
 
     def accept(self):
diff --git a/src/View/Debug/Window.py b/src/View/Debug/Window.py
index 5fad77df7c120aa48b1acb113030f6b20505a108..c02075a77fe51171f666fb837be3343f7798f592 100644
--- a/src/View/Debug/Window.py
+++ b/src/View/Debug/Window.py
@@ -1,5 +1,7 @@
 # -*- coding: utf-8 -*-
 
+import logging
+
 from tools import trace, timer
 
 from View.ASubWindow import ASubMainWindow
@@ -23,6 +25,8 @@ from PyQt5.QtWidgets import (
     QProgressBar, QLabel, QTextEdit,
 )
 
+logger = logging.getLogger()
+
 _translate = QCoreApplication.translate
 
 class ReplWindow(ASubMainWindow, ListedSubWindow):
@@ -71,7 +75,7 @@ class ReplWindow(ASubMainWindow, ListedSubWindow):
         self._history_ind = 0
 
         rich_code = "self.__debug_exec_result__ = " + code
-        print(f"[DEBUG] ! {code}")
+        logger.debug(f"{code}")
         try:
             value = exec(rich_code)
             value = self.__debug_exec_result__