Re: [Zope] ZClass selection property

Hi, I am trying to make a ZClass for an research ethics committee. In the zProject class I have added a property sheet including a selection for projectType value = projectTypes and added a lines property in the root folder "projectTypes" with the values. A combox comes up in the zclass property sheet with the right values from the root/lines propperty but when I add a property sheet interface I get a error mesage: Error Type: AttributeError Error Value: read When I delete the projectType property, adding a property sheet interface works. I have tried putting the projectTypes lines property in various places without a change. Any suggestions as tto what I should try next? david