From: "Alexey L." Date: 2010-11-30T19:10:17+09:00 Subject: Re: can't install ruby-prof 0.7.0 or superior on windows try installing a prebuilt binary. There is no one for the last version, so you have to say: gem install ruby-prof --platform=mswin32 -v 0.8.1 -- Posted via http://www.ruby-forum.com/.