Hi Camillo, Clément and I are simulating Pharo for Sista and I've spotted the following small problem with the BasicCommandLineHandler's use of stdout. It looks like a bug in MultiByteFileStream>wantsLineEndConversion:. BasicCommandLineHandler>>initializeStdout sets stdout's line end conventuion, but in doing so MultiByteFileStream>wantsLineEndConversion: sends MultiByteFileStream>detectLineEndConvention, which is wrong, because stdout is write-only. I needed to change the simulator to fail as the VM does, but perhaps a better fix is not to try and read from write-only streams. Anyway, thought I'd point it out. No biggie. 16r101B18 M MultiByteFileStream>detectLineEndConvention 16r1F3A7A0: a(n) MultiByteFileStream 16r101B38 I MultiByteFileStream>wantsLineEndConversion: 16r1F3A7A0: a(n) MultiByteFileStream 16r101B60 I BasicCommandLineHandler(CommandLineHandler)>initializeStdout 16r1F3A654: a(n) BasicCommandLineHandler 16r101B84 I BasicCommandLineHandler(CommandLineHandler)>initialize 16r1F3A654: a(n) BasicCommandLineHandler 16r101BA4 I BasicCommandLineHandler>initialize 16r1F3A654: a(n) BasicCommandLineHandler 16r101BBC M BasicCommandLineHandler class(Behavior)>new 16r5B04CC: a(n) BasicCommandLineHandler class 16r101BD4 M [] in BasicCommandLineHandler class>startUp: 16r5B04CC: a(n) BasicCommandLineHandler class -- best, Eliot