Hi, I forgot to mention in my previous mail how to load refactoring support (currently refactoring tool support doesn't load by default): Gofer it squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfMagritte3'; load. ConfigurationOfMagritte3 project stableVersion load: 'Magritte-Pharo-Tools' This will load refactoring support to move Magritte 1 or 2 described objects to instance-side pragma descriptions. It also loads deprecated code such as #description with redirects to #magritteDescription with a deprecation warning. ----- So that everything is the same place here are the porting guidelines I posted previously: 1) search for all senders and implementors of #description in your code, if they are magritte descriptions rename the selector from #description to #magritteDescription 2) remove #magritteDynamic and remove the block around the method. 3) Use the refactoring support to move class-side descriptions to instance side descriptions with pragmas - making sure that any accessors to class side methods are either prefixed with ‘class’ or moved to the instance side. If you move description help methods to instance side be careful if they contain: 'context := PRCurrentContext value' as context will shadow an instance variable of the same name so either replace context with 'self context' and remove 'context := PRCurrentContext value' or rename context say theContext and replace 'context := PRCurrentContext value' with 'theContext := self context'. 4) Remove any empty categories on the class side. 5) PRWidget derived classes should either by modified to be derived from PRWidgetPropertyBase or keep derived from PRWidget but modify the accessors to store state in instance variable rather than the property dictionary in PRWidgetPropertyBase. See PRViewsWidget and PRSearchWidget for examples of both types of port. 6) Modify structure initialisation with PRComponent to use prototype instance rather than classes. So (PRComponent named: 'contents') componentClass: PRContentsWidget; write: '%c' using: PRContentsWidget descriptionHeading; yourself becomes: (PRComponent named: 'contents') prototypeInstance: (PRContentsWidget new heading: '%c'; yourself); yourself add setters to allow initial settings to be set on the prototype instances again see PRViewsWidget and PRSearchWidget for examples. 7) Put a break point in Object>>description and Object class>>description to trap any cases you’ve missed (the break-point should not be hit) and check the add-on. Note Object>>#description and Object class>>#description are only present if you load 'Magritte-Deprecated'