diff --git a/tryton/gui/window/view_form/view/list_gtk/parser.py b/tryton/gui/window/view_form/view/list_gtk/parser.py
index 8f374e76f3..06142ec529 100644
--- a/tryton/gui/window/view_form/view/list_gtk/parser.py
+++ b/tryton/gui/window/view_form/view/list_gtk/parser.py
@@ -65,6 +65,8 @@ class ParserTree(ParserInterface):
                     if boolean_fields in node_attrs:
                         node_attrs[boolean_fields] = \
                                 bool(int(node_attrs[boolean_fields]))
+                if fname not in fields:
+                    continue
                 fields[fname].update(node_attrs)
                 node_attrs.update(fields[fname])
                 cell = CELLTYPES.get(fields[fname]['type'])(fname, treeview,
diff --git a/tryton/gui/window/view_form/widget_search/form.py b/tryton/gui/window/view_form/widget_search/form.py
index a691f94231..29c0f91d1d 100644
--- a/tryton/gui/window/view_form/widget_search/form.py
+++ b/tryton/gui/window/view_form/widget_search/form.py
@@ -90,14 +90,15 @@ class Parse(object):
         if name in ('form','tree'):
             self.title = attrs.get('string', self.title)
             self.container.new(self.col)
-        elif name=='field':
-            val  = attrs.get('select', False) \
-                    or self.fields[str(attrs['name'])].get('select', False)
-            if val:
-                if int(val) <= 1:
-                    self.add_widget(attrs, val)
-                else:
-                    self.add_widget_end.append((attrs, val))
+        elif name == 'field':
+            if attrs['name'] in self.fields:
+                val  = attrs.get('select', False) \
+                        or self.fields[attrs['name']].get('select', False)
+                if val:
+                    if int(val) <= 1:
+                        self.add_widget(attrs, val)
+                    else:
+                        self.add_widget_end.append((attrs, val))
 
     def add_widget(self, attrs, val):
         ftype = attrs.get('widget', self.fields[str(attrs['name'])]['type'])