SAP Message AAPO124 - Asset &1 is a group asset, transaction not allowed

Diagnosis
You entered a group asset, rather than a normal asset, in the currentposting transaction. This entry is not allowed, since you can only postto a group asset by posting to the assets assigned to it. The onlyexceptions are transactions that directly influence value adjustments,such as write-ups or unplanned depreciation.

System Response
The posting is rejected.

Procedure
Check the asset number you entered.