diff --git a/src/gui_qt/graphs/graphwindow.py b/src/gui_qt/graphs/graphwindow.py
index 029d9ff..b0dee37 100644
--- a/src/gui_qt/graphs/graphwindow.py
+++ b/src/gui_qt/graphs/graphwindow.py
@@ -7,6 +7,7 @@ import uuid
 from math import isnan
 from pathlib import Path
 
+import numpy as np
 from numpy import errstate, floor, log10
 from pyqtgraph import GraphicsObject, getConfigOption, mkColor
 
@@ -137,7 +138,13 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
         r = self.plotItem.getViewBox().viewRange()
         for i in [0, 1]:
             if self.log[i]:
-                r[i] = tuple([10**x for x in r[i]])
+                tmp = [np.nan, np.nan]
+                for j, x in enumerate(r[i]):
+                    try:
+                        tmp[j] = 10**x
+                    except OverflowError:
+                        pass
+                r[i] = tuple(tmp)
             else:
                 r[i] = tuple(r[i])
 
diff --git a/src/gui_qt/main/mainwindow.py b/src/gui_qt/main/mainwindow.py
index 444fd1f..a6cc098 100644
--- a/src/gui_qt/main/mainwindow.py
+++ b/src/gui_qt/main/mainwindow.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import datetime
 import os
 import pathlib
 import re
@@ -9,6 +10,7 @@ from numpy import geomspace, linspace
 from pyqtgraph import ViewBox
 
 from nmreval.configs import *
+from nmreval.io.sessionwriter import NMRWriter
 
 from .management import UpperManagement
 from ..Qt import QtGui, QtPrintSupport
@@ -73,6 +75,11 @@ class NMRMainWindow(QtWidgets.QMainWindow, Ui_BaseWindow):
             if Updater.get_update_information(os.getenv('APPIMAGE'))[0]:
                 self.look_for_update()
 
+        self.__timer = QtCore.QTimer()
+        self.__savepath = config_paths() / f'{datetime.datetime.now().strftime("%Y-%m-%d_%H%M%S")}.nmr'
+        self.__timer.start(0.2*60*1000)  # every three minutese
+        self.__timer.timeout.connect(self._autosave)
+
     def _init_gui(self):
         self.setupUi(self)
         make_action_icons(self)
@@ -1020,6 +1027,9 @@ class NMRMainWindow(QtWidgets.QMainWindow, Ui_BaseWindow):
     def close(self):
         write_state({'History': {'recent path': str(self.path)}})
 
+        # remove backup file when closing
+        self.__savepath.unlink(missing_ok=True)
+
         super().close()
 
     def read_state(self):
@@ -1043,3 +1053,8 @@ class NMRMainWindow(QtWidgets.QMainWindow, Ui_BaseWindow):
 
         QLog(parent=self).show()
 
+    def _autosave(self):
+        # TODO better separate thread may it takes some time to save
+        self.status.setText('Autosave...')
+        NMRWriter(self.management.graphs, self.management.data).export(self.__savepath)
+        self.status.setText('')
diff --git a/src/gui_qt/main/management.py b/src/gui_qt/main/management.py
index 51a2b10..3f2ccc0 100644
--- a/src/gui_qt/main/management.py
+++ b/src/gui_qt/main/management.py
@@ -180,7 +180,10 @@ class UpperManagement(QtCore.QObject):
             graph.active = active
             graph.listWidget.blockSignals(True)
             for i, l in enumerate(g['in_legend']):
-                graph.listWidget.item(i).setCheckState(l)
+                try:
+                    graph.listWidget.item(i).setCheckState(QtCore.Qt.Checked if l else QtCore.Qt.Unchecked)
+                except AttributeError:
+                    pass
             graph.listWidget.blockSignals(False)
 
             #  set unchecked in tree and hide/show in plot