what is Exec format error in daemons

[Junkone]

Exec format error - E:/TradingTools/Development/app/helpers/
twsMonitor.rb
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
application.rb:109:in `exec'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
application.rb:109:in `start_exec'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
application.rb:230:in `start'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
controller.rb:69:in `run'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/Daemons.rb:
136:in
`run'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
cmdline.rb:
105:in `call'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
cmdline.rb:
105:in `catch_exceptions'
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/Daemons.rb:
135:in
`run'
E:/TradingTools/Development/app/helpers/Ruby-1.rb:15
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
daemonize.rb:
126:in `initialize': stream closed (IOError)
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/interface.rb:96:in `join'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/interface.rb:96:in `end_session'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/interface.rb:162:in `shutdown'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/processor.rb:118:in `shutdown'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/processor.rb:386:in `wrap_up'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/processor.rb:366:in `each'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/processor.rb:366:in `wrap_up'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/loader.rb:106:in `wrap_up'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/loader.rb:133
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/loader.rb:132:in `skip'
from E:/Program Files/ActiveState Komodo IDE 4.2/lib/support/
dbgp/
rubylib/rdbgp/loader.rb:132
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
daemons/
cmdline.rb:110
e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/daemons/
application.rb:109:in `exec': Exec format error - E:/TradingTools/
Development/app/helpers/twsMonitor.rb (Errno::ENOEXEC)
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
daemons/
application.rb:109:in `start_exec'
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
daemons/
application.rb:230:in `start'
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
daemons/
controller.rb:69:in `run'
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
Daemons.rb:
136:in `run'
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
daemons/
cmdline.rb:105:in `call'
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
daemons/
cmdline.rb:105:in `catch_exceptions'
from e:/ruby/lib/ruby/gems/1.8/gems/daemons-1.0.9/lib/
Daemons.rb:
135:in `run'
from E:/TradingTools/Development/app/helpers/Ruby-1.rb:15

my code looks like this
require "Daemons"
options = {
:app_name => "my_app",
:ARGV => ['start', '-f'],
:dir_mode => :script,
:dir => 'pids',
:multiple => true,
ntop => true,
:mode => :exec,
:backtrace => true,
:monitor => true,
:script => "E:\\TradingTools\\Development\\app\\helpers\\"
}
filename="E:\\TradingTools\\Development\\app\\helpers\\twsMonitor.rb"
Daemons.run(filename, options)