The RCLASS or WCLASS field can be referred to know the Boolean Class for an application area and call-up point.
For application area FI and call-up point line item, the Boolean class is 09.
The set up for the call-up points and which Boolean classes are used for FI Validations/Substitutions details can be found in table GB31 in the system.
As seen above, the table has entries for other application areas also like Asset Management (AM), Controlling (CO) etc, but we will be only looking at the 5 entries for FI.
If the prerequisite is met and the check is not fulfilled, the message is displayed.
The validation rules are activated at company code level.