Question

I am trying to get redcar to run on a windows 7 x64 box but I am getting the following error:

Redcar 0.8.1 ( java )
Error loading plugin: <Plugin swt 1.0 depends:[dep(core >0)] 0 files>
  cannot link Java class org.eclipse.swt.widgets.Display, probable missing dependency: Cannot load 32-bit SWT libraries on 64-bit JVM
  c:/devtools/jruby-1.5.3/lib/ruby/site_ruby/shared/builtin/javasupport/java.rb:51:in `method_missing'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:129
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:31:in `require'
  c:/devtools/jruby-1.5.3/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/plugin_manager/lib/plugin_manager/plugin_definition.rb:41:in `load'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/plugin_manager/lib/plugin_manager/plugin_definition.rb:58:in `log_requires'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/plugin_manager/lib/plugin_manager/plugin_definition.rb:40:in `load'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/plugin_manager/lib/plugin_manager.rb:128:in `load_plugin'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/plugin_manager/lib/plugin_manager.rb:109:in `load'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:111:in `load_prerequisites'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:142:in `load_threaded'
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:28
  C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:19:in `load'
  c:\devtools\jruby-1.5.3\bin\redcar:19
C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:50:in `show': uninitialized constant Swt::Graphics (NameError)
        from C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/plugins/swt/lib/swt.rb:97:in `create_splash_screen'
        from C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/lib/redcar.rb:168:in `show_splash'
        from C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:29
        from C:/devtools/jruby-1.5.3/lib/ruby/gems/1.8/gems/redcar-0.8.1/bin/redcar:19:in `load'
        from c:\devtools\jruby-1.5.3\bin\redcar:19

The error seems to indicate a problem with SWT being the 32-bit version. Since eclipse based application run fine on my machine I guess there is something I am missing here.

Steps I used to install redcar:

• download and install jruby (used the 64-bit executable)
• run jruby -S gem install redcar to install the redcar gem
• run redcar install

I also tried to install from source but with the same result.

Answer 1

Redcar doesn’t support Win64 yet. Not for any particular reason, we’re just getting to it.

If you want to make it work, copy the 64 bit swt jar on top of the win32.jar in ~/.redcar/jars

If that doesn’t do the job, get in touch.