Hi Setiadi,
As I understand you are using the following process:
1) Expense is booked on Internal Order/ WBS.
2) This I/O or WBS is settled on AUC
3) Postings are required to be transferred from AUC back to cost center and expensed.
I need to explore if we can use both GL and Cost Center assignment in AIAB. Any one is possible, the second assignment being fixed.
However, as a work-a-round, you could explore the following options:
1) Can the expense be transferred from IO or WBS to cost center using the same GL as original expense?
2) If you wish to use AIAB, a longer process would be if you can use a fixed GL/ Cost Center only for this purpose and then re-transfer the expense to the required GL and Cost Center assignment.
Regards,
Achal