HTTP Status 404 - while accessing BO4.0 CMC

Error:

While accessing CMC from url http://hostname:Port/BOE/CMC you get error

HTTP Status 404 -
---------------------------------------------------------------------------
type Status report
message

description The requested resource () is not available.

Resolution:

Even though there are more possibilities for this error. In my case there was an port conflict with earlier tomcat server. So i have changed port number for tomcat port number in file 

D:\Program Files (x86)\SAP BusinessObjects\Tomcat6\conf and edit server file to replace default 8080 port to other open port like 9090