From: Leray Raphael Date: 2011-01-06T20:07:09+09:00 Subject: Error message installing the feedtools gem. I'm currently studying Ruby with the book : "Beginning Ruby, from novice to professional" and I'm having a problem with the installation of the "feedtools" gem. When I do this => sudo gem install feedtools I got this => ERROR: Error installing feedtools: activemodel requires builder (~> 2.1.2, runtime) I tried to install a gem named "builder" and it worked fine, but I still got the same error message. I'm on Ubuntu 10.04 LTS and ruby 1.8.7 (2010-01-10 patchlevel 249). Any help or advice would be appreciated. Thanks in advance. -- Posted via http://www.ruby-forum.com/.