JScript error in My Tasks page in PWA 2010

Environment: Project Server 2010 (Tasks page)

Issue:

After successfully migration of Project Server 2007 data into the Project Server 2010 version, I got a JS error when I try to enter date in Actual Finish Date field or any other date field (see attached screen shot) and in result, I was not able to enter any information.




Solution:

For some unknown reason, the "Tasks" page generated this error after migration 2007 version data. Following steps need to follow to fix this error

1. Go to Central Administration
2. Click Manage Service Applications >>Project Server Service Application
3. Delete the specific PWA instance
4. Create again with same "Project Web App Path" name and use the same existing four Project Server databases
5. After Provisioned, go to Tasks page , you will not get any more the sepcific error mentioned above.

Cheers!