No such file or directory

Hello All,

Periodically I have get from live site the following error via email
that send me from rescue action of application.rb
What do you think happen ? Rails run under FastCGI.

Regards,
Pavel

Error Msg:
No such file or directory

Trace Msg:
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/
cgi_process.rb:217:in flush'C:/ruby/lib/ruby/gems/1.8/gems/ actionpack-2.1.1/lib/action_controller/cgi_process.rb:217:inout’C:/
ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/
dispatcher.rb:149:in handle_request'C:/ruby/lib/ruby/gems/1.8/gems/ actionpack-2.1.1/lib/action_controller/dispatcher.rb:107:indispatch’C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/
action_controller/dispatcher.rb:104:in synchronize'C:/ruby/lib/ruby/ gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb: 104:indispatch’C:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/
action_controller/dispatcher.rb:120:in dispatch_cgi'C:/ruby/lib/ruby/ gems/1.8/gems/actionpack-2.1.1/lib/action_controller/dispatcher.rb: 35:indispatch’C:/ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/
fcgi_handler.rb:103:in process_request'C:/ruby/lib/ruby/gems/1.8/gems/ rails-2.1.1/lib/fcgi_handler.rb:153:inwith_signal_handle
r’C:/ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/fcgi_handler.rb:
101:in process_request'C:/ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/ fcgi_handler.rb:78:inprocess_each_request’C:/ruby/lib/ruby/site_ruby/
1.8/fcgi.rb:598:in each_cgi'C:/ruby/lib/ruby/site_ruby/1.8/fcgi.rb: 595:ineach’C:/ruby/lib/ruby/site_ruby/1.8/fcgi.rb:595:in
each_cgi'C:/ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/ fcgi_handler.rb:77:inprocess_each_request’C:/ruby/lib/ruby/gems/1.8/
gems/rails-2.1.1/lib/fcgi_handler.rb:76:in catch'C:/ruby/lib/ruby/ gems/1.8/gems/rails-2.1.1/lib/fcgi_handler.rb:76:inprocess_each_request’C:/ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/
fcgi_handler.rb:50:in process!'C:/ruby/lib/ruby/gems/1.8/gems/ rails-2.1.1/lib/fcgi_handler.rb:24:inprocess!’…/public/
dispatch.fcgi:24