diff --git a/AppImageBuilder.yml b/AppImageBuilder.yml
index 76f0498..8bcd034 100644
--- a/AppImageBuilder.yml
+++ b/AppImageBuilder.yml
@@ -44,7 +44,6 @@ AppDir:
       - python3.9-minimal
       - python3-numpy
       - python3-scipy
-      - gnuplot-nox
       - python3-bsddb3
       - python3-h5py
       - python3-pyqt5
diff --git a/src/gui_qt/graphs/graphwindow.py b/src/gui_qt/graphs/graphwindow.py
index 5c182ca..91fea37 100644
--- a/src/gui_qt/graphs/graphwindow.py
+++ b/src/gui_qt/graphs/graphwindow.py
@@ -11,6 +11,7 @@ import numpy as np
 from numpy import errstate, floor, log10
 from pyqtgraph import GraphicsObject, getConfigOption, mkColor
 
+from nmreval.lib.logger import logger
 from nmreval.utils.text import convert
 from ..io.filedialog import FileDialog
 
@@ -497,7 +498,6 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
         self.ymax_lineedit.setText('%.5g' % r[1][1])
 
     def _update_zorder(self):
-        print('update yorder')
         for i, sid in enumerate(self.sets):
             plt = self.real_plots[sid]
             if plt.zValue() != 2*i+1:
@@ -518,7 +518,6 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
         if self._block:
             return
 
-        print('update legend')
         self.listWidget.blockSignals(True)
 
         for i in range(self.listWidget.count()):
@@ -530,7 +529,6 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
         self.show_legend()
 
     def show_legend(self):
-        print('show legend')
         if not self.legend.isVisible():
             return
 
@@ -634,7 +632,7 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
             try:
                 item_dic = plot_item.get_data_opts()
             except Exception as e:
-                print(f'{item} could not exported because {e.args}')
+                logger.exception(f'{item} could not exported because {e.args}')
                 continue
 
             if len(item) == 2:
@@ -648,7 +646,7 @@ class QGraphWindow(QtWidgets.QGraphicsView, Ui_GraphWindow):
             try:
                 dic['items'].append(item.get_data_opts())
             except Exception as e:
-                print(f'{item} could not be exported because {e.args}')
+                logger.exception(f'{item} could not be exported because {e.args}')
                 continue
 
             in_legend.append(False)