[Zope] XMLRPC returns error sometimes

[Gijs Reulen]

I am experimenting with xml-rpc and Zope. Some Methods from the API work ok,
but others return an error. A common error is:

Error Value: cannot marshal <extension class
Acquisition.ImplicitAcquirerWrapper at 00C950F0> objects

I receive this error for example when for Zope 2.1.6 I execute:
ObjectManager.objectValues
Where as the next Method works ok:
ObjectManager.objectItems

Maybe the to be returned info is to complex ?

Gijs Reulen