Posting - Accounting Entry not happening

Dear All,

I have created a billing document with reference to Delivery.

But accounting document has not been created.

The System responded with the Log:

"Account 300004 requires an assignment to a CO object"

+Diagnosis

You have not defined a CO account assignment for an account that is relevant to cost accounting.

System Response

Account 300004 is defined as a cost element.

This means that you must always specify a CO account assignment.

Procedure

Enter one of the following CO account assignments

Order

Cost center / cost center/ activity type

Sales order item (for a project or cost relevant)

Project / WBS element

Cost object (Process manufacturing)

Network/ Network activities

Business process

Profitability segment

Real estate object

The posting row affected is 0000001010, account 300004.+

Note: We are not attaching any Internal Order in to Sales Order.

Thanks and Best Regards,

Amit Kumar Yadav