Hi all! I have developed a container ZClass. Within I created another ZClass which presents a meta-class for file-uploads. Now there is the case that I still want to upload diffenrent things and let them be described by an extended meta-class object. I have developed another product which uses services from the upload product. There I intended to create an extended ZClass derived from the meta-class. But unfortunately the BaseClass listview does not allow to select classes from my other product! This is what I have: Product A | class 1 (container for class 2 objects) | class 2 (additional information objects) and this is what i want: Product B | class 3 (subclass of class 2, additional properties) There seems to be no way to subclass from class 2 here, is there? Can this be done, and if, how? Regards, Ingo ------------------------------------------