Function &1: Transfer manager cannot process result object &2

What causes this issue?

The BRFplus function uses result object &V2& which is defined as an
element (a single field).

System Response

The transfer manager used in settlement management cannot assign a value
to an element which does not belong to one of the target structures of
the transfer event. Because the result object does not belong to one of
the target structures, it is not possible to assign this function to a
transfer rule of the transfer manager.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.