WBS settlement to Internal OI with Result Analysis

Hi PS expert,

One of my client would like to settle finally WBS element to Internal Order.

The particularity is that WIP is calculated on WBS element.

- When WBS is RELEASED

• Running of KKA2 ==> Result: WIP is computed
• Runing of CJ88 (periodic settlement) ==> Result: FI Document is created

- When WBS is TECO,

• Running of KKA2 ==> Result: WIP is canceled
• Running of CJ88 (global settlement) ==> Result: FI Document is created and canceled the previous one. One problem: WBS is NOT settled to Internal order defined in settlement rule of WBS

One thing: WBS is defined as account assignment and billing element.

Any ideas?

Thanks!