Default fund center to CI in FMCIA

Dear all,

I believe this works before in ECC but actually with S4Hana I do not see a reason why the default Fund Center value in Commitment item master records is not getting defaulted during FI posting.

I just need a commitment item taken from FS00 and Fund center taken from FMCIA to be populated automatically during FI normal posting (FB01, FB50, etc).

What could be the reason? is there any other recommendation for the above requirement ?

Thanks a lot

Tarek