Traceback (innermost last):
  Module ZPublisher.Publish, line 114, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 40, in call_object
  Module Shared.DC.Scripts.Bindings, line 311, in __call__
  Module Shared.DC.Scripts.Bindings, line 348, in _bindAndExec
  Module Products.PythonScripts.PythonScript, line 323, in _exec
  Module None, line 9, in galeria_py
   - <PythonScript at /oguaira/portal_skins/custom/galeria_py>
   - Line 9
AttributeError: image_preview