From: Jonathan Heinen Date: 2006-07-20T11:00:12+09:00 Subject: [RoR] problems using own class Hi, I just build my own class that looks like this class Rechnungsdaten attr_accessor :nummer end I saved this file as "rechnungsdaten.rb" in the models folder. When I use this code: @rechnung = Rechnungsdaten.new @rechnung.nummer = @rechnungsnummer I get this error message in my browser: undefined method `nummer=' for # How could this be? I can't understand that! Or do I have to include the class by using requieres? .... But why doesn't rails say me that it can't find >> Rechnungsdaten <