Strange ArgumentError with render_template

Hi I am getting a wrong number of arguments (4 for 1) error when
render_template is called for the
auto_complete_for_demerit_slip_std_name action (which does an inline
render (render :inline => “<%= auto_complete_result @items,
‘#{view_method}’ %>”)):

Processing
DemeritSlipsController#auto_complete_for_demerit_slip_std_name (for
127.0.0.1 at 2007-05-14 11:10:46) [POST]
Session ID: 213f674068cde2f579f46472f07cf709
Parameters: {“action”=>“auto_complete_for_demerit_slip_std_name”,
“demerit_slip”=>{“std_name”=>“b”}, “controller”=>“demerit_slips”}

ArgumentError (wrong number of arguments (4 for 1)):
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:744:in
render_template' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:744:inrender_with_no_layout’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/layout.rb:256:in
render_without_benchmark' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:50:inrender’
c:/ruby/lib/ruby/1.8/benchmark.rb:293:in measure' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:50:inrender’
/vendor/plugins/common_field_validations/lib/common_field_validations.rb:27:in
auto_complete_for_demerit_slip_std_name' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1095:insend’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1095:in
perform_action_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:632:incall_filter’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:634:in
call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:incall_filter’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:438:in
call' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:incall_filter’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:in
call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:438:incall’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:in
call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:incall_filter’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:438:in
call' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:incall_filter’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:638:in
call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:449:incall’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:637:in
call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:619:inperform_action_without_benchmark’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' c:/ruby/lib/ruby/1.8/benchmark.rb:293:inmeasure’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/rescue.rb:83:inperform_action’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in
send' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:inprocess_without_filters’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:624:in
process_without_session_management_support' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:inprocess’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:330:in
process' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:indispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:113:in
handle_dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:inservice’
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
c:/ruby/lib/ruby/1.8/webrick/server.rb:173:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:162:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:95:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in each' c:/ruby/lib/ruby/1.8/webrick/server.rb:92:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:23:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:82:instart’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:63:in
dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/webrick.rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:ingem_original_require’
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:342:in
new_constants_in' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
script/server:3

Rendering
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/templates/rescues/layout.rhtml
(500 Internal Error)

What can I do?

Best regards,
Juan