Help with debugging - undefined method `[]' for nil:NilClass (NoMethodError) ?

Hello all,

Question for you all... I never came across this yet, I have an app
where in developement it works perfect, but when I tried to launch it
in production mode I received the following error below.. How can I
figure out what undefined method is?

/filestore/files/projects/keith/config/environment.rb:56: undefined
method `[]' for nil:NilClass (NoMethodError)

More details:

** Starting Rails with production environment...
Exiting
/filestore/files/projects/keith/config/environment.rb:56: undefined
method `[]' for nil:NilClass (NoMethodError)
        from ./script/../config/../vendor/rails/railties/lib/
initializer.rb:95:i n `run'
        from /filestore/files/projects/keith/config/environment.rb:18
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_re quire'
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`require'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:510:in `require'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:355:in `new_constants_in'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:510:in `require'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/
rails.rb:14 7:in `rails'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
113:in `cloa ker_'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
configurator.rb:14 9:in `call'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
configurator.rb:14 9:in `listener'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
99:in `cloak er_'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
configurator.rb:50 :in `call'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
configurator.rb:50 :in `initialize'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
84:in `new'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
84:in `run'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/
command.rb:212:in `run'
        from /var/lib/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:
281
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:503:in `load'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:503:in `load'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:355:in `new_constants_in'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:503:in `load'
        from /filestore/files/projects/keith/vendor/rails/railties/lib/
commands/ servers/mongrel.rb:64
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_re quire'
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`require'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:510:in `require'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:355:in `new_constants_in'
        from /filestore/files/projects/keith/vendor/rails/
activesupport/lib/acti ve_support/
dependencies.rb:510:in `require'
        from /filestore/files/projects/keith/vendor/rails/railties/lib/
commands/ server.rb:39
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`gem_original_re quire'
        from /usr/lib/ruby/1.8/rubygems/custom_require.rb:27:in
`require'
        from script/server:3

Thank you in advance!
- John

Have you looked at what is on that line? No one can even begin to help without knowing that.

-Rob

Rob Biedenharn http://agileconsultingllc.com
Rob@AgileConsultingLLC.com

Rob,

I figured it out, I was referencing a variable that didnt exist.

Thanks
- John