Ruby error: cannot load such file -- wdm (LoadError)

Question

I've been having some major issues with Jekyll on windows. I finally get it working so i run

jekyll build

Then

jekyll serve --watch

Then i get the following error, can anyone help?

The full error is:

C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require':
cannot load such file -- wdm (LoadError)
        from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:i
n `require'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:207:in `load_dependent_adapter'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
s/windows.rb:33:in `load_dependent_adapter'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:198:in `usable?'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
s/windows.rb:25:in `usable?'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:190:in `usable_and_works?'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:57:in `block in select_and_initialize'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:55:in `each'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/adapter
.rb:55:in `select_and_initialize'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/listene
r.rb:291:in `initialize_adapter'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/listene
r.rb:283:in `setup'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/listen-1.3.1/lib/listen/listene
r.rb:52:in `start'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/jekyll-1.4.0/lib/jekyll/command
s/build.rb:56:in `watch'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/jekyll-1.4.0/lib/jekyll/command
s/build.rb:8:in `process'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/jekyll-1.4.0/bin/jekyll:97:in `
block (2 levels) in <top (required)>'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/c
ommand.rb:180:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/c
ommand.rb:180:in `call'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/c
ommand.rb:155:in `run'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/r
unner.rb:402:in `run_active_command'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/r
unner.rb:66:in `run!'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/d
elegates.rb:11:in `run!'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/commander-4.1.5/lib/commander/i
mport.rb:10:in `block in <top (required)>'

Answer 1

I had the same problem. Fixed the problem very simply by setting "Windows Directory Monitor".

gem install wdm

And Include this line in the Gemfile:

gem 'wdm'

Good luck!