Hi,
Could you please check note:
684659 - FAQs about account assignment objects
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[1] Question: Why is an account assignment object not assigned to an
account even though it is defined in the asset master record or has been
entered manually during the posting?
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It says that if you activate the required account assignment object
in your customizing settings (SPRO->IMG->Financial Accounting->Asset
Accounting->Integration with the General Ledger->Additional Account
Assignment Objects) you will define whether the corresponding account
assignment object is relevant to the balance sheet or whether the
account assignment object must be identical with the account assignment
object from the master record while posting.
IMG documentation:
Activities:
1. Activate the account assignment objects you need for Asset
Accounting.
2. Specify whether the account assignment object is relevant to the
balance sheet. Account assignment objects that are relevant to the
balance sheet can no longer be changed directly in the asset master
record once the asset has been capitalized. Instead, such assets have to
be transferred to a new asset master record to make this change.
3. Specify whether the account assignment object you enter when posting
has to agree with the account assignment object entered in the asset
master record. If you set this indicator, you cannot change the account
assignment object when posting.
Regards,
Cristiano