I receive the following error when trying to install it. C:/Ruby/bin/ruby.exe -rubygems C:/Ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake RUBYARCHDIR=C:/Ruby/lib/ruby/gems/1.8/gems/ruby-opengl-0.60.1/lib RUBYLIBDIR=C:/Ruby/lib/ruby/gems/1.8/gems/ruby-opengl-0.60.1/lib ruby mkrf_conf.rb (in C:/Ruby/lib/ruby/gems/1.8/gems/ruby-opengl-0.60.1) call rake --nosearch cl -nologo -MD -Zi -O2b2xg- -G6 -DWIN32 -DRUBY_VERSION=186 -IC:/Ruby/include -IC:/Ruby/lib/ruby/1.8/i386-mswin32 -IC:/Ruby/lib/ruby/site_ruby/1.8 -I. -c gl-1.0-1.1.c (in C:/Ruby/lib/ruby/gems/1.8/gems/ruby-opengl-0.60.1/ext/gl) 'cl' is not recognized as an internal or external command, operable program or batch file. rake aborted! Command failed with status (1): [cl -nologo -MD -Zi -O2b2xg- -G6 -DWIN32 ...] (See full trace by running task with --trace) rake aborted! Command failed with status (1): [call rake --nosearch...] (See full trace by running task with --trace) -------------------------------------- I've tried manually installing it and automatically installing it - both fail. I'm currently using the latest one-click installer version of ruby 186.27. All other gems on my system are updated and working fine with the exception of this one. My gems system is up to date. I've searched heavily for this topic and all topics found do not contain a fix for the issue I'm having. Any help would be greatly appreciated. thanks. -- Posted via http://www.ruby-forum.com/.