How can use Expense pool under the mapping set Resourse Absortion and Overhead Absortion

Summary:

Now I set both mapping sets but need to determine the account combination according to the Expense Pool

But when run the accounting process show me this error that is because not set a default combination.

I set a default combination like the first screenshot and then run but the absorption only uses the default value under this mapping set not use the combination of Inventory organization and Expense pool code.

How can use this requirement correctly?

Our scenario is one account is used for person research and the other for Machine resources.

I appreciate a lot the help for any body