現在構成中の rails-project でファイル (200kb の単純な pdf ファイル) をアップロードしようとすると、次のエラーが発生します。
(申し訳ありませんが、ScribdFile #6 は Scribd にアップロードできませんでした)
何が問題なのかを知るにはどうすればよいですか? Windows 7 を使用しています。別のシステム (Windows 7 も) で同じ構成を問題なく実行しています。
これは完全なスタックです（役立つ場合）：
C:/Ruby/lib/ruby/gems/1.8/gems/scribd_fu-2.0.9/lib/scribd_fu.rb:72:「アップロード」
C:/Ruby/lib/ruby/gems/1.8/gems/scribd_fu-2.0.9/lib/scribd_fu.rb:189:`upload_to_scribd' 内
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:178:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:178:in `evaluate_method'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:166:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:93:「実行」中
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:92:in `each'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:92:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:92:in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:276:in `run_callbacks'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:344:`コールバック'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:251:in `create_or_update'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:2538:`save_without_validation'で
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/validations.rb:1078:`save_without_dirty' で
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/dirty.rb:79:`save_without_transactions' で
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:229:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:229:in `with_transaction_returning_status'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/database_statements.rb:136:「トランザクション」で
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:182:「トランザクション」
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:228:in `with_transaction_returning_status'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:196:`保存'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/transactions.rb:196:`保存'
C:/Ruby/lib/ruby/gems/1.8/gems/rubyist-aasm-2.1.1/lib/aasm/persistence/active_record_persistence.rb:196:in `aasm_write_state'
C:/Ruby/lib/ruby/gems/1.8/gems/rubyist-aasm-2.1.1/lib/aasm/aasm.rb:107: in `set_aasm_current_state_with_persistence'
C:/Ruby/lib/ruby/gems/1.8/gems/rubyist-aasm-2.1.1/lib/aasm/aasm.rb:160:`aasm_fire_event'で
C:/Ruby/lib/ruby/gems/1.8/gems/rubyist-aasm-2.1.1/lib/aasm/aasm.rb:61:in
convert!' c:/xampp/htdocs/lightbulb/app/models/scribd_file.rb:30:inafter_initialize'C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:347:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/callbacks.rb:347:`コールバック'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/base.rb:2441: in `initialize'
c:/xampp/htdocs/lightbulb/app/controllers/attachments_controller.rb:51:「新規」
c:/xampp/htdocs/lightbulb/app/controllers/attachments_controller.rb:51:「create_attachment」内
c:/xampp/htdocs/lightbulb/app/controllers/attachments_controller.rb:49:「それぞれ」で
c:/xampp/htdocs/lightbulb/app/controllers/attachments_controller.rb:49:「create_attachment」内
c:/xampp/htdocs/lightbulb/app/controllers/attachments_controller.rb:12:「作成」
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1331:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1331:in `perform_action_without_filters'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:617:in `call_filters'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17: in `ms'
C:/Ruby/lib/ruby/1.8/benchmark.rb:308:「リアルタイム」で
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17: in `ms'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/rescue.rb:160:in `perform_action_without_flash'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/flash.rb:146:in `perform_action'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `send'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `process_without_filters'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in `process_without_compass'
C:/Ruby/lib/ruby/gems/1.8/gems/chriseppstein-compass-0.8.17/lib/compass/app_integration/rails/action_controller.rb:7:「プロセス」内
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:391:「プロセス」内
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:437:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:87:in `dispatch'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:121:in `_call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:130:`build_middleware_stack' 内
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/query_cache.rb:34:「キャッシュ」内
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:`キャッシュ'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:28:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/haml-3.0.24/lib/sass/plugin/rack.rb:41:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/string_coercion.rb:25:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/session/cookie_store.rb:93:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:「同期」中
C:/Ruby/lib/ruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:106:in `call'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/cgi_process.rb:44:in `dispatch_cgi'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:101:in `dispatch_cgi'
C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:27:in `dispatch'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/rails.rb:76:「プロセス」内
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/rails.rb:74:in `synchronize'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/rails.rb:74:「プロセス」内
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:159:`process_client' 内
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:158:「それぞれ」
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:158:`process_client' 内
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:285:「実行」中
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:285:「初期化」
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:285:「新規」
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:285:「実行」中
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:268: in `initialize'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:268:「新規」
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel.rb:268:「実行」中
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/configurator.rb:282: in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/configurator.rb:281:「それぞれ」
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/configurator.rb:281: in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/bin/mongrel_rails:128: in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/lib/mongrel/command.rb:212: in `run'
C:/Ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.5-x86-mingw32/bin/mongrel_rails:281
C:/Ruby/bin/mongrel_rails:19:in `load'
C:/Ruby/bin/mongrel_rails:19