Hi,
why you are doing like this and fallow the below setps.
it is not possible to copy the standard data source.
create the copy of FM ZECPCA_BIW_GET_DATA form the staandard FM - RSAX_BIW_GET_DATA.
E_T_DATA - it is the internal table for the FM - give the strucute name with type.
first check the FM then based on the FM crate the data source in RS02.
-Phani.