No acct assignment for on-acct payments in payment-based general ledger

What causes this issue?

You post an nonassigned payment (payment on account) and want to update
it in the cash ledger. However, the document does not contain an expense
or revenue account for advance payments.

System Response

Posting is terminated.

How to fix this error?

Check that a constant for nonassigned payments is defined for document
splitting in Customizing of <ZK>Financial Accounting (new)</> under
<DS:SIMG.FAGL_CONSTANTS_DC>Edit Constants for Nonassigned Processes</>.
Assign this constant to a revenue or expense account in Customizing of
<ZK>Public Sector Management</> under <DS:SIMG.PSM_FAGL_CL_CONST>Edit
Constants for Nonassigned Processes</><ZK> </>
If no constant for nonassigned payments is defined for document
splitting in Customizing, proceed as follows:
Create a constant.
Assign the constant to an expense or revenue account.
To enable you to update payments on accounts in the cash ledger, create
a business transaction variant in Customizing of <ZK>Financial
Accounting (new)</> under <DS:SIMG.FISL_PS_GBEB_PRCS_DC>Define Business
Transaction Variants</> for the business transaction <ZK><LS>Payment
(1000) </></> Assign this variant to the constant for nonassigned
processes. Under <DS:SIMG.SIMG_FAGL_SPLIT_02DC>Define Document Splitting
Rule</> then define a rule for payments on account for the active
document splitting and assign the business transaction and the business
transaction variant to the predefined document type.

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

Procedure for System Administrators

INCLUDE NA_PSM_CUSTOMIZ OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.