NoMethodError (You have a nil object when you didn't expect it!
The error occured while evaluating nil.nodehash):
    .//app/controllers/xml_rcs_controller.rb:160:in `commit'
    /usr/lib/ruby/1.8/rexml/element.rb:939:in `each'
    /usr/lib/ruby/1.8/rexml/xpath.rb:53:in `each'
    /usr/lib/ruby/1.8/rexml/element.rb:939:in `each'
    .//app/controllers/xml_rcs_controller.rb:147:in `commit'
    /usr/lib/ruby/1.8/rexml/element.rb:939:in `each'
    /usr/lib/ruby/1.8/rexml/xpath.rb:53:in `each'
    /usr/lib/ruby/1.8/rexml/element.rb:939:in `each'
    .//app/controllers/xml_rcs_controller.rb:60:in `commit'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/base.rb:910:in `perform_action_without_filters'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/filters.rb:368:in `perform_action_without_benchmark'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
    /usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/benchmarking.rb:69:in `perform_action_without_rescue'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/rescue.rb:82:in `perform_action'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/base.rb:381:in `process_without_filters'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/filters.rb:377:in `process_without_session_management_support'
    /usr/lib64/ruby/gems/1.8/gems/actionpack-1.12.3/lib/action_controller/session_management.rb:117:in `process'
    /usr/lib64/ruby/gems/1.8/gems/rails-1.1.4/lib/dispatcher.rb:38:in `dispatch'
    /usr/lib64/ruby/gems/1.8/gems/rails-1.1.4/lib/webrick_server.rb:115:in `handle_dispatch'
    /usr/lib64/ruby/gems/1.8/gems/rails-1.1.4/lib/webrick_server.rb:81:in `service'
    /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
    /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
    /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
    /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
    /usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
    /usr/lib64/ruby/gems/1.8/gems/rails-1.1.4/lib/webrick_server.rb:67:in `dispatch'
    /usr/lib64/ruby/gems/1.8/gems/rails-1.1.4/lib/commands/servers/webrick.rb:59
    /usr/lib64/ruby/1.8/rubygems/custom_require.rb:21:in `require'
    /usr/lib64/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
    /usr/lib64/ruby/gems/1.8/gems/rails-1.1.4/lib/commands/server.rb:30
    /usr/lib64/ruby/1.8/rubygems/custom_require.rb:21:in `require'
    /usr/lib64/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:147:in `require'
    script/server:3