ZMRBR - invoices released but not in FBL1N

Hello everybody,

I have a problem with a few invoices which were released in ZMRBR (through management approval) but the invoices were not automatically released in FBL1N. But because the invoices had to be paid quickly, I had to manually release them through FB02.

Does anybody know why the released invoices in ZMRBR were not also automatically released in FBL1N?

Thanks for your help.