[Zope] Error Value: global name 'has' is not defined

[Zanotti Michele]

Hi all,
I have done a little zclass, in his addForm method I have this instruction:

<dtml-in
expr="restrictedTraverse('/Control_Panel/Products/myProduct/myClass/property
sheets/common/myProperties').getProperty('types')">
In Zope 2.3.3 everything works, but in Zope 2.4.1 I have this error:
Error Type: NameError
Error Value: global name 'has' is not defined
<!--
Traceback (innermost last):
  File F:\PROGRA~1\ZOPHOC~1\lib\python\ZPublisher\Publish.py, line 223, in
publish_module
  File F:\PROGRA~1\ZOPHOC~1\lib\python\ZPublisher\Publish.py, line 187, in
publish
  File F:\PROGRA~1\ZOPHOC~1\lib\python\Zope\__init__.py, line 226, in
zpublisher_exception_hook
    (Object: Traversable)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\ZPublisher\Publish.py, line 171, in
publish
  File F:\PROGRA~1\ZOPHOC~1\lib\python\ZPublisher\mapply.py, line 160, in
mapply
    (Object: m_ewdSetProoperties)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\ZPublisher\Publish.py, line 112, in
call_object
    (Object: m_ewdSetProoperties)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\OFS\DTMLMethod.py, line 194, in
__call__
    (Object: m_ewdSetProoperties)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\DocumentTemplate\DT_String.py, line
546, in __call__
    (Object: m_ewdSetProoperties)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\DocumentTemplate\DT_In.py, line 694,
in renderwob
    (Object:
restrictedTraverse('Control_Panel/Products/extMsWordDocument/extMsWordDocume
nt/propertysheets/common/contentProperties').getProperty('types'))
  File F:\PROGRA~1\ZOPHOC~1\lib\python\DocumentTemplate\DT_Util.py, line
231, in eval
    (Object:
restrictedTraverse('Control_Panel/Products/extMsWordDocument/extMsWordDocume
nt/propertysheets/common/contentProperties').getProperty('types'))
    (Info: restrictedTraverse)
  File &lt;string&gt;, line 2, in f
    (Object: guarded_getattr)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\OFS\Traversable.py, line 233, in
restrictedTraverse
    (Object: Traversable)
  File F:\PROGRA~1\ZOPHOC~1\lib\python\OFS\Traversable.py, line 193, in
unrestrictedTraverse
    (Object: Traversable)
NameError: (see above)
-->
Can you help me? 
Many thanks
Michele