BAPI_PO_CHANGE - failed to update status field

Hi All,

I am using BAPI_PO_CHANGE to update STO in my report.

Requirement - STO should update other fields and status field in Header should get updated as 'I' - Purchase Order from BAPI.

I am passing value to both structures -  POHEADER &  POHEADERX but value of this field is not getting updated, though other fields like Qty, delivery date get updated in same run.

This field can be checked in EKKO-STATU.

Note - same field gets updated when using BAPI_PO_CREATE1 while creating STO.

Please suggest.

Thank you in advance.

AB