I’m developing a CMS system with Yii 1.1 framework. Recently updated 1.1, the error tracing page seems to be taken out and juz show a “This webpage is not available.” page instead.
is it possible to display back old error tracing page back again?? or now have to use the phpunit test to find out the error?
Have you perhaps disabled debugging on the entry page?
this line in my entry script by default.
defined(‘YII_DEBUG’) or define(‘YII_DEBUG’,true);
setting it true or false never affect anything 
its kinda solve my own problem…
i have found out the error occur because i have added the following 2 line in the config file.
'onBeginRequest'=>create_function('$event', 'return ob_start("ob_gzhandler");'),
'onEndRequest'=>create_function('$event', 'return ob_end_flush();'),
Not sure its working as intended or its a bug but it might be a reference for others which have the same problem 