Not able to Access the R12 Login Page After Cloning

Recently I have faced issue which was result of corrupt java class files under $COMMON_TOP/_pages

Problem:
1. After cloning environement OA R12
                                    – Cloning terminated OK
                                    – Adconfig terminated OK
                                    - Process Oracle application are launched without error
                                    – Connection to database is OK
2. Trying to access the environment: Login Page not displayed (No Error Displayed)

Solution:
1. Shut down the Application Tier
2.Run “ojspCompile.pl” from $FND_TOP/patch/115/bin
                             perl ojspCompile.pl –compile –flush -p 2
3. Run autoconfig on both db and apps tiers
4. Bring up the services and test login

Regards,

Sukhwinder Singh