Hi Stephane,Indeed, PetitParser installation from Catalog Browser works just fine! Thank you very much.I used Monticello Browser before, but not Catalog Browser. I didn't know this is the preferred method to install package. I don't think DeepIntoPharo mentions about Catalog Browser, but maybe my version is outdated.Thanks again, Stephane.--Andreas SunardiOn Fri, May 12, 2017 at 12:48 PM, Stephane Ducasse <stepharo.self@gmail.com> wrote:Sorry I meant the catalogBrowser.Using the catalogBrowser on a given version of Pharo you should access the configuration for this version (if people updated it correctly).��Our plan is to make sure that such configurations are validated.��StefOn Fri, May 12, 2017 at 9:47 PM, Stephane Ducasse <stepharo.self@gmail.com> wrote:Hi andreasNormally you should be able to load a package using the ConfigurationBrowser and the configuration (now I do not know the one of PetitParser)should take care of the pharo version for you.��stefOn Fri, May 12, 2017 at 7:06 PM, Andreas Sunardi <a.sunardi@gmail.com> wrote:Following DeepIntoPharo, I tried to install PetitParser into my Pharo 5.0 image (I noticed PetitParser installation problem email in March). It failed with the message WinPlatform class was undefined. I went to Moose's PetitParser site in smalltalkhub and followed the instruction there, and this also failed.Out of frustration, I downloaded Moose 6.0 and thought I'd start from Moose image instead. But then I noticed Moose's PetitParser package has ConfigurationOfPetitParser from version TudorGirba.77 and the instruction I followed was trying to install it using version TudorGirba.80. Back to my Pharo 5 image, I unload/remove ConfigurationOfPetitParser and load version TudorGirba.77. And this works!But this way to solve PetitParser installation problem seems wrong. I figure if this could very well happen with other packages too. What is the right way to find package version that works with my image/pharo version? Or is this an issue with PetitParser package itself and should I ask/report this to Moose team?--Andreas Sunardi