Hello Horacio,
Regarding the error you mentioned KD256 during settlement, there is a SAP
note 179533 talking about this error in quite details.
Please make sure:
'Transfer to Financial Accounting' is set in results analysis version. (OKG9)
Also the principle is that settlement
compares the settlement date (last day of settlement period) with the
date where TECO has been set. If Settlement date > date of TECO, then
actual cost will be settled.
You can check TECO date with referrence to note 530563.
It is stored at AUFK-IDAT2.
If it was not in that period you will need to do the settlement in period 11.
Best regards,
Jason