Am I right that with the new compiler, the way how analyser warnings work changed too? see the description in case 12512 <https://pharo.fogbugz.com/default.asp?12512> SemanticAnalyzer ignores answer from UnknownSelectorWarning and case 12514 <https://pharo.fogbugz.com/default.asp?12514> OCSemanticWarnings ignore "cancel" from a confirmation dialog I tried to fix this but I can not figure out how the answers from an OCSemanticWarning dialog supposed to interact with the analyser/parser/compiler. Especially "Cancel" should cancel the current evaluation. I tried this with evaluationg compilationContext failBlock value That works but I don't know if this is the way it is supposed to be. For those answers that would change the code (OCUnusedVariableWarning) is another problem, that the compiler does not handle ReparseAfterSourceEditing. (see case 12442 <https://pharo.fogbugz.com/default.asp?12442> Nautilus brakes code when removing more than one unused local variables) Nicolai