I have upgraded the Tridion CMS from 2011 SP1 to 2013 SP1. The CMS is succssfully upgraded and publication and content are display fine and also set the publishing.
In the earlier version 2011,one of the publication is set with for DD4T site. After the upgrade on Content Delivery side, DD4T side is not working and getting Page not found error 404.
Just more on this, Old version DD4T were using 1.24 version. Now, I have upgrade the code to DD4T 1.31 version. So as well, I have also upgraded DD4T Template version in Upgraded CMS 2013 SP1.
I have also chceked the other scenerio, like, created a new publication, create a page and publish. it's working fine
So my probelm with the exiting publication, where after publish the page, the site is throwing error Page not found 404.