rajika@localhost lqpl-gui-0.9.0-rc2-source]$ rake build:jar --trace
rake aborted!
no such file to load -- ant
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
/home/rajika/work/lqpl/releases/0.9.0-rc2/out/lqpl-gui-0.9.0-rc2-source/tasks/ant_compile.rake:1
/home/rajika/work/lqpl/releases/0.9.0-rc2/out/lqpl-gui-0.9.0-rc2-source/Rakefile:5:in `load'
/home/rajika/work/lqpl/releases/0.9.0-rc2/out/lqpl-gui-0.9.0-rc2-source/Rakefile:5
/home/rajika/work/lqpl/releases/0.9.0-rc2/out/lqpl-gui-0.9.0-rc2-source/Rakefile:4:in `each'
/home/rajika/work/lqpl/releases/0.9.0-rc2/out/lqpl-gui-0.9.0-rc2-source/Rakefile:4
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:501:in `raw_load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:82:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:81:in `load_rakefile'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:65:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2.2/bin/rake:33
/usr/bin/rake:19:in `load'
/usr/bin/rake:19