Hi guys I found a problem with method renaming. The scenario is the following one: - you have a message browser open with a list a methods (resulting from a sender/implementor). - you rename a method and you get an error why because the message browser does not replace the currently changed method. and the RGMethodDefinition that represented the renamed method defines the code like that MessageBrowser>>wrapItem: anItem | s | s :=String streamContents: [ :aStream | 3 to: (cachedHierarchy at: anItem) size do: [:i | aStream << ' ']. aStream << anItem methodClass name << ' ('. anItem isFromTrait ifTrue: [ aStream << anItem compiledMethod origin name; space ]. aStream << (anItem category ifNil: ['']) <<')']. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^ {s. anItem selector}. RGMethodDefinition>>compiledMethod "Retrieves the compiled method of this definition if exists" | rClass | (rClass := self realClass) notNil ifTrue: [ (rClass includesSelector: self selector) ifTrue: [ ^rClass >> self selector ] ]. ^nil category ^ self protocol protocol self isActive ifTrue: [ ^ self compiledMethod category ]]. self isHistorical ifTrue: [ ^ self protocolAtPointer ifNil:[ self compiledMethod ifNil:[ protocol ] ifNotNil:[ :cm| cm category ] ] ]. ^ protocol So I patched the protocol method as follows protocol self isActive ifTrue: [ ^ self compiledMethod ifNil: [ ' '] ifNotNilDo: [ :cm | cm category ]]. "I hate this ifNil test, the problem is that when we rename a method, a method definition in a list may still refers to the old selector and the definition of compiled method is that case is not finding the associated method because it holds the old selector and not the one corresponding to the one defined in the class." self isHistorical ifTrue: [ ^ self protocolAtPointer ifNil:[ self compiledMethod ifNil:[ protocol ] ifNotNil:[ :cm| cm category ] ] ]. ^ protocol I imagine that the best solution would be that the tools update their contents but I wanted to know your point of view. Stef