SAP Note 14990 - Error message EAC391: 'Incorrect specifications'

Symptom:

Both when posting an asset as well as saving in asset Customizing, error message AC391 appears: 'There is an error in the specifications for area xy in code yz.'

Cause and prerequisites

According to the long text of the error message, this is a depreciation area whose stock values are to be posted online in the General Ledger, but which copies its posting values from another area.

Solution
If this is not a depreciation area for investment support, you can make a corresponding correction in asset Customizing.
This is not possible for an investment support area because important features are protected during Customizing Maintenance. Here the incorrect setting resulted from a copy created during regular area maintenance which was not based on an area for investment support.
To eliminate the problem, you must enter the following new correction program (Transaction SE38, local private object declaration, logical database 'D$' from application 'S'):
Make sure to change lines XXXX (chart of depreciation) or YY (this is the depreciation area) according to your requirements.

REPORT RAKORR99.
TABLES: T093A.
DATA: HLP_AFAPL LIKE T096-AFAPL VALUE 'XXXX',
HLP_AFABE LIKE T093A-AFABE VALUE 'YY'.

UPDATE T093A SET WRTAFB = '00'
XWRTID = ' '
WHERE AFAPL = HLP_AFAPL
AND AFABE = HLP_AFABE.

Additional key words

AB01, FB01, MR01, OAE1, SAPMA07C, SAPMA01B, SAPMF05A