How To Fix SWF_RLS_001121 - Operator '&1': Expressions '&2' and '&3' cannot be compared

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_RLS_001 - Condition Evaluation and Rule Evaluation

• Message number: 121

• Message text: Operator '&1': Expressions '&2' and '&3' cannot be compared

What causes this issue?

The following expressions refer to values that do not belong to value
categories:
&V2&
&V3&
These categories are:
Objects
Tables
Structures
Elementary values (numbers, character strings, date, time, ...)
In this way, for example, objects that have other objects, but that are
without tables, structures, or elementary values can be compared.

System Response

The condition entered is not syntactically correct in this format.

How to fix this error?

Correct the condition in row &V4& by using comparable data objects as
operands. 'F4 possible entries' are available both when entering
constants and also when entering expressions.

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.