My first time out; I'm reading Michael Hartl's book, and installing according to the instructions on Rubyonrails.org. Everything fine until the end of the command "gem install rails". The last three lines of the installation report on screen were: Installing ri documentation for actionpack-4.1.4... ERROR: While generating documentation for actionpack-4.1.4 ... MESSAGE: Invalid argument - ./ActionDispatch/Routing/Mapper/Scoping/: ... RDOC args: --ri --op C:/Ruby193/lib/ruby/gems/1.9.1/doc/actionpack-4.1.4/ri lib --title actionpack-4.1.4 Documentation --quiet Cheers, -dlj. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-core+unsubscribe@googlegroups.com. To post to this group, send email to rubyonrails-core@googlegroups.com. Visit this group at http://groups.google.com/group/rubyonrails-core. For more options, visit https://groups.google.com/d/optout.