diff --git a/tryton/gui/window/view_form/view/form_gtk/parser.py b/tryton/gui/window/view_form/view/form_gtk/parser.py
index 575542081d..177845b516 100644
--- a/tryton/gui/window/view_form/view/form_gtk/parser.py
+++ b/tryton/gui/window/view_form/view/form_gtk/parser.py
@@ -533,7 +533,7 @@ class ParserForm(ParserInterface):
                 notebook.set_border_width(3)
                 container.wid_add(notebook, colspan=attrs.get('colspan', 4),
                         expand=True, fill=True)
-                widget, widgets, buttons, on_write, notebook_list2, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list2, cursor_widget2 = \
                         self.parse(model, node, fields, notebook,
                                 tooltips=tooltips)
                 max_width, max_height = -1, -1
@@ -573,7 +573,7 @@ class ParserForm(ParserInterface):
                 label = gtk.Label(text)
                 label.set_angle(angle)
                 label.set_use_underline(True)
-                widget, widgets, buttons, on_write, notebook_list2, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list2, cursor_widget2 = \
                         self.parse(model, node, fields, notebook,
                                 tooltips=tooltips)
                 if not cursor_widget:
@@ -647,7 +647,7 @@ class ParserForm(ParserInterface):
                         help_tip=hlp, fill=fill, xexpand=xexpand, xfill=xfill)
 
             elif node.localName == 'group':
-                widget, widgets, buttons, on_write, notebook_list2, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list2, cursor_widget2 = \
                         self.parse(model, node, fields, tooltips=tooltips)
                 if not cursor_widget:
                     cursor_widget = cursor_widget2
@@ -678,7 +678,7 @@ class ParserForm(ParserInterface):
                 hpaned = gtk.HPaned()
                 container.wid_add(hpaned, colspan=int(attrs.get('colspan', 4)),
                         expand=True, fill=True)
-                widget, widgets, buttons, on_write, notebook_list2, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list2, cursor_widget2 = \
                         self.parse(model, node, fields, paned=hpaned,
                                 tooltips=tooltips)
                 if not cursor_widget:
@@ -694,7 +694,7 @@ class ParserForm(ParserInterface):
                 vpaned = gtk.VPaned()
                 container.wid_add(vpaned, colspan=int(attrs.get('colspan', 4)),
                         expand=True, fill=True)
-                widget, widgets, buttons, on_write, notebook_list, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list, cursor_widget2 = \
                         self.parse(model, node, fields, paned=vpaned,
                                 tooltips=tooltips)
                 if not cursor_widget:
@@ -707,7 +707,7 @@ class ParserForm(ParserInterface):
                 if 'position' in attrs:
                     vpaned.set_position(int(attrs['position']))
             elif node.localName == 'child1':
-                widget, widgets, buttons, on_write, notebook_list2, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list2, cursor_widget2 = \
                         self.parse(model, node, fields, paned=paned,
                                 tooltips=tooltips)
                 if not cursor_widget:
@@ -719,7 +719,7 @@ class ParserForm(ParserInterface):
                     dict_widget[widget_name].extend(widgets)
                 paned.pack1(widget, resize=True, shrink=True)
             elif node.localName == 'child2':
-                widget, widgets, buttons, on_write, notebook_list, cursor_widget2 = \
+                widget, widgets, buttons, spam, notebook_list, cursor_widget2 = \
                         self.parse(model, node, fields, paned=paned,
                                 tooltips=tooltips)
                 if not cursor_widget: