Adding New Account Assignment in EBP SRM 4.0

Hello Experts,

We are in SRM 4.0 Classic Scenario.

We have Account Assignment 'R' in backend ECC system. And now we want to add/activate the same in EBP.

So I added new account assignment at SRM>SRM Server>Cross Application Basic Setting>Account Assignment>Define Account assignment categories:

Here I added account Asiignment 2R which is mapped to 'R'. and checked active flag.

And also maintained Acct Assignment fields.

Then I added this Account assignment in my attributes.

But now when i try creating SC, while i click on 'Cost Assignment' section, system gives dump.(GETWA_NOT_ASSIGNED).

Am I missing any config or BADI implementaion here?

Pls let me know.

Thanks,

Dhananjay