Hi, It should load the execute 'run.rb' file, but it does not, as in file /usr/lib/ruby/gems/1.8/gems/nitro-0.19.0/bin/nitro, 'Dir.pwd' is different from that in '/usr/bin/nitro', which calls the former. To see the problem yourself, insert 'Dir.pwd' in each of the above mentioned files. Regards, Michael