updating LIMIT and EXP_LIMIT fields using BAPI_PO_CHANGE

Hi all,

I'm using the 'BAPI_PO_CHANGE' FM to update the PO "OVERALL" limit and "EXPECTED" value of a Purchase Order No. But it returns error.

Could anyone send me the code for UPDATING these 2 fields (PO_LIMITS -> LIMIT and EXP_LIMIT values) using BAPI_PO_CHANGE with all the correct input and output parameters and tables.