I am trying to see the senders of a message. I select "startsWith:" in a workspace -> right button -> extended search -> senders of it and I get a wallback. If you think this is a bug, let me know and I add it to the issue tracker. Thanks, Mariano MessageNotUnderstood: OBShowSenders class>>of:label: 20 March 2009 1:11:08 am VM: unix - a SmalltalkImage Image: Pharo0.1 [Latest update: #10256] SecurityManager state: Restricted: false FileAccess: true SocketAccess: true Working Dir /home/mariano/squeak/imagenes Trusted Dir /home/mariano/squeak/imagenes/secure Untrusted Dir /home/mariano/squeak/imagenes/My Squeak OBShowSenders class(Object)>>doesNotUnderstand: #of:label: Receiver: OBShowSenders Arguments and temporary variables: aMessage: of: an OBSelectorNode label: 'Senders of startsWith: [4]' exception: MessageNotUnderstood: OBShowSenders class>>of:label: resumeValue: nil Receiver's instance variables: superclass: OBNavigate methodDict: a MethodDictionary(#browserClass->a CompiledMethod (3617) #noChildr...etc... format: 136 instanceVariables: nil organization: ('as yet unclassified' browserClass noChildrenMessage) subclasses: nil name: #OBShowSenders classPool: nil sharedPools: nil environment: Smalltalk category: #'OB-Standard-Announcements' traitComposition: nil localSelectors: nil DEVToolSet class>>browseSendersOf:name:autoSelect: Receiver: DEVToolSet Arguments and temporary variables: aSymbol: #startsWith: labelString: 'Senders of startsWith: [4]' autoSelectString: 'startsWith:' Receiver's instance variables: superclass: StandardToolSet methodDict: a MethodDictionary() format: 2 instanceVariables: nil organization: ('as yet unclassified') subclasses: nil name: #DEVToolSet classPool: nil sharedPools: nil environment: Smalltalk category: #ImageForDevelopers traitComposition: nil localSelectors: nil ToolSet class>>browseSendersOf:name:autoSelect: Receiver: ToolSet Arguments and temporary variables: aSymbol: #startsWith: titleString: 'Senders of startsWith: [4]' autoSelectString: 'startsWith:' Receiver's instance variables: superclass: AppRegistry methodDict: a MethodDictionary() format: 2 instanceVariables: nil organization: ('as yet unclassified') subclasses: nil name: #ToolSet classPool: nil sharedPools: nil environment: Smalltalk category: #'System-Applications' traitComposition: nil localSelectors: nil registeredClasses: an OrderedCollection(StandardToolSet OTToolset DEVToolSet) default: DEVToolSet SystemNavigation>>browseSendersOf:name:autoSelect: Receiver: a SystemNavigation Arguments and temporary variables: aSelector: #startsWith: labelString: 'Senders of startsWith:' autoSelectString: 'startsWith:' title: 'Senders of startsWith: [4]' size: 4 senders: an OrderedCollection(a MethodReference Algernon >> #isMatchingClass:gi...etc... Receiver's instance variables: browserClass: nil hierarchyBrowserClass: nil --- The full stack --- OBShowSenders class(Object)>>doesNotUnderstand: #of:label: DEVToolSet class>>browseSendersOf:name:autoSelect: ToolSet class>>browseSendersOf:name:autoSelect: SystemNavigation>>browseSendersOf:name:autoSelect: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - SystemNavigation>>browseAllCallsOn: [] in TextMorphForShoutEditor(ParagraphEditor)>>sendersOfIt {[self systemNavigation browseAllCallsOn: aSelector]} TextMorphForShoutEditor(Controller)>>terminateAndInitializeAround: TextMorphForShoutEditor(ParagraphEditor)>>sendersOfIt [] in PluggableShoutMorph(PluggableTextMorph)>>sendersOfIt {[textMorph editor sendersOfIt]} [] in PluggableShoutMorph(PluggableTextMorph)>>handleEdit: {[result := editBlock value]} TextMorphForShout(TextMorph)>>handleEdit: PluggableShoutMorph(PluggableTextMorph)>>handleEdit: PluggableShoutMorph(PluggableTextMorph)>>sendersOfIt UndefinedObject(Object)>>perform:orSendTo: [] in ToggleMenuItemMorph(MenuItemMorph)>>invokeWithEvent: {[(selArgCount := selector numArgs) = 0 ifTrue: [target perform: selector] ...]} BlockContext>>ensure: CursorWithMask(Cursor)>>showWhile: ToggleMenuItemMorph(MenuItemMorph)>>invokeWithEvent: ToggleMenuItemMorph(MenuItemMorph)>>mouseUp: ToggleMenuItemMorph(MenuItemMorph)>>handleMouseUp: MouseButtonEvent>>sentTo: ToggleMenuItemMorph(Morph)>>handleEvent: MorphicEventDispatcher>>dispatchDefault:with: MorphicEventDispatcher>>dispatchEvent:with: ToggleMenuItemMorph(Morph)>>processEvent:using: MorphicEventDispatcher>>dispatchDefault:with: MorphicEventDispatcher>>dispatchEvent:with: ...etc...