I have added websites on my TMG HTTPs inspection and excluded these sites from it. However the websites are still getting blocked with below mentioned error. These are https websites.

Error Code 12229: The page was blocked by HTTPS inspection.  Date: 7/29/2013 5:14:33 AM [GMT]  Server: MCR-TMG-01.parco.com.pk  Source: Proxy

Hi,

please check if the websites are correctly exluded from HTTPS inspection. Check the URL and check the TMG live logging to see which firewall policy rule blocks the request:
http://technet.microsoft.com/de-de/library/ee796230.aspx
http://blogs.technet.com/b/isablog/archive/2009/10/19/common-problems-while-implementing-https-inspection-on-forefront-tmg-2010-rc.aspx