For CO-PA documents you can use BAPI_COPAACTUALS_POSTCOSTDATA.
Also, please check this http://scn.sap.com/docs/DOC-49228
Rgds
Murali. N
For CO-PA documents you can use BAPI_COPAACTUALS_POSTCOSTDATA.
Also, please check this http://scn.sap.com/docs/DOC-49228
Rgds
Murali. N