diff --git a/tryton/gui/window/view_form/model/group.py b/tryton/gui/window/view_form/model/group.py
index 6e2cdaaa25..cfef2cd5d7 100644
--- a/tryton/gui/window/view_form/model/group.py
+++ b/tryton/gui/window/view_form/model/group.py
@@ -13,18 +13,19 @@ class ModelList(list):
 
     def insert(self, pos, obj):
         if pos >= 1:
-            self.__getitem__(pos - 1).next = obj
+            self.__getitem__(pos - 1).next[id(self)] = obj
         if pos < self.__len__():
-            obj.next = self.__getitem__(pos)
+            obj.next[id(self)] = self.__getitem__(pos)
         else:
-            obj.next = None
+            obj.next[id(self)] = None
         super(ModelList, self).insert(pos, obj)
         if not self.lock_signal:
             self.__screen.signal('record-changed', ('record-added', pos))
 
     def append(self, obj):
         if self.__len__() >= 1:
-            self.__getitem__(self.__len__() - 1).next = obj
+            self.__getitem__(self.__len__() - 1).next[id(self)] = obj
+        obj.next[id(self)] = None
         super(ModelList, self).append(obj)
         if not self.lock_signal:
             self.__screen.signal('record-changed', ('record-added', -1))
@@ -33,9 +34,9 @@ class ModelList(list):
         idx = self.index(obj)
         if idx >= 1:
             if idx + 1 < self.__len__():
-                self.__getitem__(idx - 1).next = self.__getitem__(idx + 1)
+                self.__getitem__(idx - 1).next[id(self)] = self.__getitem__(idx + 1)
             else:
-                self.__getitem__(idx - 1).next = None
+                self.__getitem__(idx - 1).next[id(self)] = None
         super(ModelList, self).remove(obj)
         if not self.lock_signal:
             self.__screen.signal('record-changed', ('record-removed', idx))
diff --git a/tryton/gui/window/view_form/model/record.py b/tryton/gui/window/view_form/model/record.py
index 96e968bdd6..2f31b14b92 100644
--- a/tryton/gui/window/view_form/model/record.py
+++ b/tryton/gui/window/view_form/model/record.py
@@ -39,7 +39,7 @@ class ModelRecord(SignalEvent):
         self.modified_fields = {}
         self.read_time = time.time()
         self.attachment_count = -1
-        self.next = None
+        self.next = {}
         for key, val in self.mgroup.mfields.items():
             self.value[key] = val.create(self)
             if (new and val.attrs['type']=='one2many') \
diff --git a/tryton/gui/window/view_form/view/form.py b/tryton/gui/window/view_form/view/form.py
index afec35d3e7..02c95d646d 100644
--- a/tryton/gui/window/view_form/view/form.py
+++ b/tryton/gui/window/view_form/view/form.py
@@ -145,10 +145,10 @@ class ViewForm(ParserView):
         return self.widgets[name]
 
     def destroy(self):
-        self.widget.destroy()
         for widget in self.widgets.keys():
             self.widgets[widget].widget.destroy()
             del self.widgets[widget]
+        self.widget.destroy()
         del self.widget
         del self.widgets
         del self.screen
diff --git a/tryton/gui/window/view_form/view/list.py b/tryton/gui/window/view_form/view/list.py
index 82222571c9..48d0c7984c 100644
--- a/tryton/gui/window/view_form/view/list.py
+++ b/tryton/gui/window/view_form/view/list.py
@@ -24,14 +24,14 @@ class AdaptModelGroup(gtk.GenericTreeModel):
     def added(self, modellist, position):
         if modellist is self.models:
             model = self.models[position]
-            self.emit('row_inserted', self.on_get_path(model),
-                      self.get_iter(self.on_get_path(model)))
+            self.row_inserted(self.on_get_path(model),
+                    self.get_iter(self.on_get_path(model)))
 
     def cancel(self):
         pass
 
     def removed(self, lst, position):
-        self.emit('row_deleted', position)
+        self.row_deleted(position)
         self.invalidate_iters()
 
     def append(self, model):
@@ -71,10 +71,10 @@ class AdaptModelGroup(gtk.GenericTreeModel):
         prev = None
         for model in self.models:
             if prev:
-                prev.next = model
+                prev.next[id(self.models)] = model
             prev = model
         if prev:
-            prev.next = None
+            prev.next[id(self.models)] = None
         self.rows_reordered(None, None, new_order)
 
     def __len__(self):
@@ -109,7 +109,7 @@ class AdaptModelGroup(gtk.GenericTreeModel):
 
     def on_iter_next(self, node):
         try:
-            return node.next
+            return node.next[id(self.models)]
         except IndexError:
             return None