Hi Dharmakasi,
Thanks for your reply. I've done the configuration and its working fine using item category and partner determination procedure. All the routes are updating at line items when changed at header.
However there is a problem if I manually change one of the route at item level.
After this it doesn't update that item's route when changed at header although other items are updating.
Please let me know if there is a solution for this.
Thanks,
Abhishek