Enter a PA transfer structure

What causes this issue?

A PA transfer structure is required for settlement to profitability
analysis.

System Response

You cannot save this settlement rule.

How to fix this error?

Enter a PA transfer structure. To do this, choose the "Parameters"
function in the settlement rule. As part of customizing, you can also
store a default value for the PA analyis structure, in the settlement
profile. The system then uses this default value when you enter a
settlement rule.

Error message extract from SAP system. Copyright SAP SE.