I was creating a new video tutorial to show how to find all comments in all classes but I'm getting errors in both Squeak 4.3 and Pharo 1.3. In Squeak 4.3, the error is: Key not found: Comment In Pharo 1.3, the error is: Improper store into indexable object. the code is: myNav := SystemNavigation default. (myNav allMethodsWithSourceString: '"' matchCase: false) do: [:each| Transcript show: each asString, ' => ', ( each actualClass commentsIn: each sourceString);cr ] In Pharo, the error shows up after the Transcript output: UndefinedObject>>DoIt (myNav is Undeclared) In Squeak the error shows up each time after the Transcript output: [...] AbstractSound class updateScorePlayers => an OrderedCollection('Force all ScorePlayers to update their instrument list from the sound library. This may done after loading, unloading, or replacing a sound to make all ScorePlayers feel the change.') UndefinedObject>>DoIt (myNav is Undeclared) UndefinedObject>>DoIt (myNav is Undeclared) Help? Error shows up in Squeak 4.3 image running both in the all-in-one distribution, and running on Cog VM. In Pharo 1.3 using Cog VM. Mac OS X 10.6.8. Thanks, Lawson