problem creating goods return.

hi

I am creating a release order using idocs(PORDCR01) and against that release order 3 different goods receipts (mvmt type 101) are made each of quantity 5 through idocs (WMMBID02).

Now i need to create a goods return (122) against the RO for quantity 15 using idocs. But its giving me an error saying that the PO is deficit of quantity 10. Its considering only the first goods receipt with quantity 5. Is there any way by which all the three goods receipts quantities are considered at one time for goods return.

Goods movements are created against RO only.

appreciate any suggestions for the same!

thanks.

Anand