[Zope] Error(possible bug) on adding an external method

[Cornel Nitu]

Hi,

I have a DTMLMethod with the following content:
         <dtml-call 
"PARENTS[0].manage_addExternalMethod('mumu','','striphtml','strip')">
where PARENTS[0] is a folder.
I get the following error:

Error Type: AttributeError
Error Value: manage_addExternalMethod

PS. There is no error in the script.