Substitution FI/0005 is not supported any more

What causes this issue?

In your ERP release before upgrade to S/4HANA you have defined in
<DS:TRAN.FINS_FAREA_FROM_COBL>transaction FINS_FAREA_FROM_COBL</> that
the functional area shall be derived during postings <zh>not</> on entry
screen, but as late as during the <ls>Save</> event. This setting
obsolete: It is not evaluated any more by the system. Instead, in
S/4HANA the system always derives the functional area already on the
entry screen of posting transactions when you press <ls>Enter</>.
In addition you had activated the subsitution for application FI,
call-up point 0005 which works based on structure ACCIT. This
substitution is not supported any more in S/4HANA. If you still need a
subsitution for deriving the functional area you can use the new
substitution for application FI, call-up point <zh>0006</> which can be
activated with IMG activity <DS:SIMG.V_T001Q_FI_0006_DC>Define and
Activate Substitution for Cost-of-Sales Accounting</>.
Note that you can enter the functional area also in the master data of
cost center, orders, G/L accounts etc. which should reduce the need for
using substitutions.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

To achieve that this error message is not sent any more, start the old
<DS:TRAN.OBBZ>transaction OBBZ</> and deactivate the obsolete
subsitution FI/0005 for all company codes: To do this, enter the value 0
(zero) in column <ls>Activation Level</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.