help with Magritte tutorial

hey i working through the magritte tutorial excercises. need ome help with exercise 18. it says "Add a class-instance variable to the MAPersonModel called CustomDescription. initialize it with an emptyinstance of maContainer". i did the following to add a class-instance variable MAPersonModel class instanceVariableNames: 'CustomDescription' how do i initialize this variable if i override the initialize method on the class i get the follwoing warning from system browser "initialize is used in the existing class system, overriding can cause serious problem is this really what you want to do ?" am i doing something wrong, can some one help me ? im not sure what the difference between class variable and class-instance variable -- View this message in context: http://www.nabble.com/help-with-Magritte-tutorial-tf4242237.html#a12071267 Sent from the SmallWiki mailing list archive at Nabble.com.