show error controller
Array
(
    [controller] => about.html
    [action] => index
    [module] => default
    [error_handler] => ArrayObject Object
        (
            [storage:ArrayObject:private] => Array
                (
                    [exception] => Zend_Controller_Dispatcher_Exception Object
                        (
                            [message:protected] => Invalid controller specified (about.html)
                            [string:Exception:private] => 
                            [code:protected] => 0
                            [file:protected] => /var/www/html/library/Zend/Controller/Dispatcher/Standard.php
                            [line:protected] => 241
                            [trace:Exception:private] => Array
                                (
                                    [0] => Array
                                        (
                                            [file] => /var/www/html/library/Zend/Controller/Front.php
                                            [line] => 934
                                            [function] => dispatch
                                            [class] => Zend_Controller_Dispatcher_Standard
                                            [type] => ->
                                            [args] => Array
                                                (
                                                    [0] => Zend_Controller_Request_Http Object
                                                        (
                                                            [_paramSources:protected] => Array
                                                                (
                                                                    [0] => _GET
                                                                    [1] => _POST
                                                                )

                                                            [_requestUri:protected] => /about.html
                                                            [_baseUrl:protected] => 
                                                            [_basePath:protected] => 
                                                            [_pathInfo:protected] => /about.html
                                                            [_params:protected] => Array
                                                                (
                                                                    [controller] => about.html
                                                                    [action] => index
                                                                    [module] => default
                                                                    [error_handler] => ArrayObject Object
 *RECURSION*
                                                                )

                                                            [_aliases:protected] => Array
                                                                (
                                                                )

                                                            [_dispatched:protected] => 1
                                                            [_module:protected] => default
                                                            [_moduleKey:protected] => module
                                                            [_controller:protected] => error
                                                            [_controllerKey:protected] => controller
                                                            [_action:protected] => error
                                                            [_actionKey:protected] => action
                                                        )

                                                    [1] => Zend_Controller_Response_Http Object
                                                        (
                                                            [_body:protected] => Array
                                                                (
                                                                )

                                                            [_exceptions:protected] => Array
                                                                (
                                                                    [0] => Zend_Controller_Dispatcher_Exception Object
 *RECURSION*
                                                                )

                                                            [_headers:protected] => Array
                                                                (
                                                                )

                                                            [_headersRaw:protected] => Array
                                                                (
                                                                )

                                                            [_httpResponseCode:protected] => 200
                                                            [_isRedirect:protected] => 
                                                            [_renderExceptions:protected] => 
                                                            [headersSentThrowsException] => 1
                                                        )

                                                )

                                        )

                                    [1] => Array
                                        (
                                            [file] => /var/www/html/library/Zend/Application/Bootstrap/Bootstrap.php
                                            [line] => 97
                                            [function] => dispatch
                                            [class] => Zend_Controller_Front
                                            [type] => ->
                                            [args] => Array
                                                (
                                                )

                                        )

                                    [2] => Array
                                        (
                                            [file] => /var/www/html/library/Zend/Application.php
                                            [line] => 366
                                            [function] => run
                                            [class] => Zend_Application_Bootstrap_Bootstrap
                                            [type] => ->
                                            [args] => Array
                                                (
                                                )

                                        )

                                    [3] => Array
                                        (
                                            [file] => /var/www/html/index.php
                                            [line] => 27
                                            [function] => run
                                            [class] => Zend_Application
                                            [type] => ->
                                            [args] => Array
                                                (
                                                )

                                        )

                                )

                            [previous:Exception:private] => 
                        )

                    [type] => EXCEPTION_NO_CONTROLLER
                    [request] => Zend_Controller_Request_Http Object
                        (
                            [_paramSources:protected] => Array
                                (
                                    [0] => _GET
                                    [1] => _POST
                                )

                            [_requestUri:protected] => /about.html
                            [_baseUrl:protected] => 
                            [_basePath:protected] => 
                            [_pathInfo:protected] => /about.html
                            [_params:protected] => Array
                                (
                                    [controller] => about.html
                                    [action] => index
                                    [module] => default
                                )

                            [_aliases:protected] => Array
                                (
                                )

                            [_dispatched:protected] => 1
                            [_module:protected] => default
                            [_moduleKey:protected] => module
                            [_controller:protected] => about.html
                            [_controllerKey:protected] => controller
                            [_action:protected] => index
                            [_actionKey:protected] => action
                        )

                )

        )

)