Generic Extraction using BAPI

Dear All,

I have a BAPI function module in the APO system and i need to extract the data using this bapi to bw. When i am trying to create a generic extractor based on this bapi it is saying that TABLES-Parameter E_T_DATA for extractor BAPI_PBSRVAPS_GETDETAIL2 is missing. As this is a standard BAPI in the source system and I cannot have a structure to add to this function module, please help me in creating the data source.

Thanks and Regards

Vijay