Hi Fahd,
Please try as below.
Prerequisite:
BSEG-HKONT IN ZACC_GLNONFED
Check:
NOT BSEG-VBUND IN AAA-ZZZZ
Message:
Create message. Message type E
*If prerequisite Yes(specified GL exist) check also Yes (BSEG-VBUND not in AAA-ZZZZ) error message.
*Create Set for AAA-ZZZZ
Thanks & Regards,
Prasad