Posting branched to: document contains &1 subledger accounts

What causes this issue?

You post a payment, down payment clearing or transfer in which more
than three customer or vendor accounts are involved.

System Response

If you post the document entered, it could cause performance problems
with the payment selection (program RFFMS200). Furthermore, it is then
no longer guaranteed that errors with the payment selection can be
reconstructed.

How to fix this error?

You must make sure that such postings do not take place. Avoid grouping
together amounts that do not belong together functionally in bank
clearing accounts.
<ZH>Note for German Government Customers</>
For payments that are distributed across more than three customer or
vendor items, you should use the <LS>Payment Distribution</> function
(transaction FMPAYD).

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.