SQL Error 339

Hi All,

I am writing an AMDP method with multiple selects into it. Below is the code for the calling Program :

TABLES: mseg.
SELECT-OPTIONS: s_matnr FOR mseg-matnr,
                 s_pspnr FOR mseg-mat_pspnr,
                 s_werks FOR mseg-werks.

START-OF-SELECTION.
   DATA : lo_amdp TYPE REF TO zamdp.
   DATA : gt_416 TYPE zamdp=>gtt_quan,
              gt_415 TYPE zamdp=>gtt_quan,
              gt_qbew TYPE zamdp=>gtt_quan,
              gt_28x TYPE zamdp=>gtt_quan,
              gt_usnam TYPE zamdp=>gtt_usnam.

   CREATE OBJECT lo_amdp.

   DATA : lt_seltab  TYPE if_shdb_def=>tt_named_dref,
          lv_where   TYPE string,
          lst_seltab TYPE if_shdb_def=>ts_named_dref.

   lst_seltab-name = 'MATNR'.
   GET REFERENCE OF s_matnr[] INTO lst_seltab-dref.
   APPEND lst_seltab TO lt_seltab.
   CLEAR lst_seltab.
   lst_seltab-name = 'MAT_PSPNR'.
   GET REFERENCE OF s_pspnr[] INTO lst_seltab-dref.
   APPEND lst_seltab TO lt_seltab.

   cl_shdb_seltab=>combine_seltabs( EXPORTING it_named_seltabs  = lt_seltab
                                    RECEIVING rv_where          = lv_where ).

   CALL METHOD Zamdp=>meth_mseg_quan(
     EXPORTING
       im_where = lv_where
     IMPORTING
       ex_416   = gt_416
       gt_415   = gt_415
       gt_qbew   = gt_qbew
       gt_28x   = gt_28x ).

   cl_demo_output=>display_data( EXPORTING value = gt_416 ).

The AMDP Code is as attached.

I am not getting what exactly needs to be done to resolve the issue.

Thanks & Regards

Srinivas Rao