Role container element '&1' is not filled

What causes this issue?

No data flow is defined from the clarification case container to the
role container element '&V1&'.

System Response

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

How to fix this error?

Maintain the data flow or the processor rule.

Procedure for System Administrators

&NOTE&
IF &V2& = ' '
Container element '&V1&' refers to the DDIC table field &V3&-.
&V4&.
ELSE
Container element '&V1&' refers to business object &V2&.
ENDIF

Error message extract from SAP system. Copyright SAP SE.