Packaging data not populated in customs declaration

Hi all,

I'm creating Pro-forma invoice in ECC and as a result Custom Declaration is getting created in GTS. In GTS the Packaging data in item level is coming as empty. So I implemented the BADI /SAPSLL/IF_EX_IFEX_SD0C_R3 and tried to pass the packaging data. But as a result the custom document stopped getting created in GTS.

I'm using the below code to populate the fields of the table cs_itm_cdoc-pge-

LOOP AT lit_vepo ASSIGNING <lfs_vepo>.
        lwa_itmpge-item_number = <lfs_vepo>-posnr.
        lwa_itmpge-int_id = <lfs_vepo>-vepos.
        lwa_itmpge-quantity = <lfs_vepo>-vemng.
        lwa_itmpge-dim_uom = <lfs_vepo>-vemeh.
        APPEND lwa_itmpge TO cs_itm_cdoc-pge.

        CLEAR lwa_itmpge.

      ENDLOOP.

I'm taking the value of <lfs_vepo> from the standard table vepo. Can anybody please tell me what I'm doing wrong?

Thanks,

Sarif