3113965 - Error "Special G/L transactions of type A are not supported" in Fiori Apps

Error "Special G/L transactions of type A are not supported" appears when using the Fiori Apps, such as "Clear Incoming Payments", "Clear Outgoing Payments", "Post Incoming Payments" and "Post Outgoing Payments".

Or special G/L indicators of type A can not be selected in these Apps.

SAP S/4HANA Cloud Public Edition

It is not supported to manually enter or post on account with a special G/L indicator of type A.

In the Fiori Apps, special G/L transactions of type A can be used only in combination with a down payment request.
Down payment requests can be created via app "Manage Customer Down Payment Requests" or "Manage Supplier Down Payment Requests".

With regard to down payments, you can kindly refer to best practices:
Accounts Payable (‏J60‏): https://rapid.sap.com/bp/scopeitems/J60
Accounts Receivable (‏J59‏): https://rapid.sap.com/bp/scopeitems/J59

Special G/L Indicator, Clear Incoming Payments, Clear Outgoing Payments, Post Incoming Payments, Post Outgoing Payments, Special G/L transactions of type A, Down Payment Request , KBA , FI-FIO-AP-2CL , Fiori UI for Accounts Payable (Public Cloud) , FI-FIO-AR-2CL , Fiori UI for Accounts Receivable (Public Cloud) , Problem