Framework page error not able to login into portal

Hi,

we are using EP 6.0 and it's working fine today i'm trying to login into portal but it's gives me the following error.

Portal Runtime Error

An exception occurred while processing a request for :

iView : pcd:portal_content/every_user/general/defaultDesktop/frameworkPages/frameworkpage/com.sap.portal.layoutPortal1_Framework

Component Name : com.sap.portal.layouts.framework.framework

i didn't understand what happened, we are not doing any change in portal.

regards,