Problem with "Show DB Schema for Current Class"

[nexon]

There's a problem, when i try to run "Show DB Schema for Current Class", get an error:

/Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:308:in to_plist': An object in the argument tree could not be converted (ArgumentError) from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:308:inblock in initialize'
from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:307:in popen' from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:307:ininitialize'
from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:20:in new' from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/ui.rb:20:indialog'
from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Bundle Support.tmbundle/Support/shared/lib/progress.rb:42:in call_with_progress' from /Users/albertolagos/Library/Application Support/TextMate/Managed/Bundles/Ruby on Rails.tmbundle/Support/bin/show_schema.rb:5:in

'