Issue in doing Goods Receipt through FM

Hello Experts,

I am trying to use BAPI_GOODSMVT_CREATE for doing Goods Receipt against Purchase Order.

When I try to do it through normal MIGO transaction, I don t get any error but when I try to post it through BAPI I get the below error-

"Special Stock Q not supported (check your entry)".

I am passing the same movement type and special stock as in MIGO transactions. Is there anything that I am missing, any pointers>?

thanks