Bug When replacing the whole form view

Hi,
When trying to open a comlex kind fo view (containing more that 3-4 pages in notebook) gtk client shows the following error.

there is NO ERROR with web client. I am providing the client side trace back for your assistance.

Regards,

Traceback (most recent call last):
  File "/home/axelor/workspace/client_5.0/bin/modules/gui/window/tree.py", line 194, in sig_open
    if not self.sig_action(widget, 'tree_but_open', warning=False):
  File "/home/axelor/workspace/client_5.0/bin/modules/gui/window/tree.py", line 188, in sig_action
    warning=warning)
  File "/home/axelor/workspace/client_5.0/bin/modules/action/main.py", line 183, in exec_keyword
    self._exec_action(action, data, context=context)
  File "/home/axelor/workspace/client_5.0/bin/modules/action/main.py", line 128, in _exec_action
    limit=datas['limit'], auto_refresh=datas['auto_refresh'])
  File "/home/axelor/workspace/client_5.0/bin/modules/gui/window/__init__.py", line 51, in create
    auto_refresh=auto_refresh)
  File "/home/axelor/workspace/client_5.0/bin/modules/gui/window/form.py", line 77, in __init__
    window=self.window, limit=limit, readonly=bool(auto_refresh))
  File "/home/axelor/workspace/client_5.0/bin/widget/screen/screen.py", line 101, in __init__
    self.display()
  File "/home/axelor/workspace/client_5.0/bin/widget/screen/screen.py", line 554, in display
    show_search=self.show_search and vt in ('tree', 'graph'),
  File "/home/axelor/workspace/client_5.0/bin/widget/screen/screen.py", line 134, in search_active
    self.domain, (self, self.search_filter))
  File "/home/axelor/workspace/client_5.0/bin/widget_search/form.py", line 218, in __init__
    self.widgets = parser.parse(xml, ww)
  File "/home/axelor/workspace/client_5.0/bin/widget_search/form.py", line 179, in parse
    psr.Parse(xml_data)

Client Rev. no.. 1025