Thanks Sanjeev for your inputs.
We are not implementing MM module in our scenario. That is out of scope for us from SAP implementation. As and when GRN happens in external system, the corresponding value updates in SAP through FI journal. What I am looking is, while posting FI journal, can I refer the commitment created through funds commitment (tcode FMZ1) so that commitment value reduces with respect to the actual cost.
Regards,
Laxminarsimha