hi Ajay,
Yes the AAC is K but the FSG is optional in both GL and CC.
I checked in my Clients server, there the FSG assigned to the GL is Expense for Cost centers, and that GL is not linked with OBYC.
but in standard FSG is G003, consumption account and it is linked with OBYC GBB-VBR, So I am not sure where is the mistake.
I tried both the scenario but same message ME45N.
kindly suggest