Hello, I'm working on Pharo 1.3 in a software content management project and I have some problems with the SystemChangeNotifier. I want to get changes between an old class and the new class when I change its category. The problem is when I change a category for a class, the SystemChangeNotifier sends this message: "class: aClass recategorizedFrom: oldCategory to: newCategory ", but I can't get the changes on the new class to get the differences between old class and new class. For example, I want to get the change of instanceVariableNames in addition of category change: I change: Object subclass: #ClassForTesting instanceVariableNames: 'a' classVariableNames: 'xx2' poolDictionaries: '' category: 'OOSCM-ClientImageTest' TO: Object subclass: #ClassForTesting instanceVariableNames: 'a b c ' classVariableNames: 'xx2' poolDictionaries: '' category: 'OOSCM-ClientImageTest2' Any help? ----- eze -- View this message in context: http://forum.world.st/ChangeNotifier-for-recategorize-a-class-tp4073854p4073... Sent from the Pharo Smalltalk mailing list archive at Nabble.com.