我在laravel 4中有以下错误，帮我解决吗？
[2015-03-01 23:54:17] production.ERROR: exception 'Symfony'Component'HttpKernel'Exception'NotFoundHttpException' in E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Routing'RouteCollection.php:148
Stack trace:
#0 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Routing'Router.php(1054): Illuminate'Routing'RouteCollection->match(Object(Illuminate'Http'Request))
#1 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Routing'Router.php(1022): Illuminate'Routing'Router->findRoute(Object(Illuminate'Http'Request))
#2 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Routing'Router.php(1001): Illuminate'Routing'Router->dispatchToRoute(Object(Illuminate'Http'Request))
#3 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Foundation'Application.php(775): Illuminate'Routing'Router->dispatch(Object(Illuminate'Http'Request))
#4 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Foundation'Application.php(745): Illuminate'Foundation'Application->dispatch(Object(Illuminate'Http'Request))
#5 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Session'Middleware.php(72): Illuminate'Foundation'Application->handle(Object(Illuminate'Http'Request), 1, true)
#6 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Cookie'Queue.php(47): Illuminate'Session'Middleware->handle(Object(Illuminate'Http'Request), 1, true)
#7 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Cookie'Guard.php(51): Illuminate'Cookie'Queue->handle(Object(Illuminate'Http'Request), 1, true)
#8 E:'Web'xampp'htdocs'blog'vendor'stack'builder'src'Stack'StackedHttpKernel.php(23): Illuminate'Cookie'Guard->handle(Object(Illuminate'Http'Request), 1, true)
#9 E:'Web'xampp'htdocs'blog'vendor'laravel'framework'src'Illuminate'Foundation'Application.php(641): Stack'StackedHttpKernel->handle(Object(Illuminate'Http'Request))
#10 E:'Web'xampp'htdocs'blog'public'index.php(49): Illuminate'Foundation'Application->run()
#11 {main} [] []
您试图访问一个未定义路由的url。
定义路由或更改您请求的url。