ZDerived1, I get unchanged results. Somewhere a copy of the old ZBase seems to lurk around. How can that be? Did you restart your Zope?
Yes I did restart Zope, but to no avail. So I decided to dig a little deeper. I exported my base class and one depending class in seperate .zexp files. I set up a new zope server, created a new product and imported the classes. I then deleted all methods from both classes, except one in the base. I modified this method to only return a fixed string. I then added a index_html method to the depending class that would only call the one remaining function in the base class. I created an instance of the depending class and tried to run index_html, but it gave an error, in the method of the base class, but alas on a line that no longer existed. To prove myself a point, I created a new depending class, directly derived from the base class and added the same index_html. Instances of this one do work. Very weird. I then exported the whole thing using xml, just to see if I could find something. Opening the xml reveiled the complete implementation of the base class, including all the methods I deleted. The method I left in the base class turned up twice, once in its new incarnation, once in its old incarnation. I did pack the database before export. I have now two simple zclasses which look completely identical, but give different results. Any clue as to what might go wrong and why deleted code shows up in an export? Douwe