BAPI for IM42 / IM52

Hello Gurus,

I wanted to distribute budget in Internal Orders using BAPI. In system tcode KO22 is locked through config and only used is IM42/IM52.

I used 'BAPI_EXPENDITUREPROGTREE_CHVAL' for distributing amount in all Positions in Budgeting Program. But it does not distribute at Internal Order level, As Internal Order does not have any Position Id assigned in IMPR table.

Could you please suggest appropriate BAPI for Distributing Budget at Internal Order level.

Thanks in advance,

Swapnil