Error "no valid screen name" for FM DYNP_VALUES_READ

Question

Hi PM Experts and ABAPers,
I have a requirement to fetch Operation tab details dynamically while creating a order through IW31 transaction.
I have tried using Function module  DYNP_VALUES_READ to fetch the screen field values dynamically to read the Work centre field value from operations tab.
Please look at the code i have used.
DATA: gv_program_name TYPE D020S-PROG VALUE 'SAPLCOIH',
             gv_screen_no    TYPE D020S-DNUM VALUE '3010',
             gs_dynpread     TYPE DYNPREAD,
             gt_dynpread     TYPE TABLE OF DYNPREAD.
clear gs_dynpread.
gs_dynpread-fieldname = 'AFVGD-ARBPL'.
APPEND gs_dynpread TO gt_dynpread.
   CALL FUNCTION 'DYNP_VALUES_READ'
     EXPORTING
       DYNAME                               = gv_program_name
       DYNUMB                               = gv_screen_no
     TABLES
       DYNPFIELDS                           = gt_dynpread
- The function module has returned a dump with error 'No valid screen name'.
Can anyone help me in reading the work centre ( ARBPL)  value directly from screen.
Thanks in advance,
Sreenivas

Answer 1

Hi Sreenivas,
Kindly check whether field-symbol is assigned before using for preventing the run-time error.
ASSIGN('(MP000800)TBLGART[]')TO<tblgart>.
"Check Whether the field-symbol value is assigned or not
IF <tblgart> IS ASSIGNED.
CREATE DATA obj_tbl LIKE LINE OF <tblgart>.
ASSIGN obj_tbl->* TO <wa_tblgart>.
ENDIF.
In CREATE DATA statement we are assigning the structure, if you know the structure name, it is better use TYPE statement instead of LIKE statement as shown below.
CREATE DATA obj_tbl TYPE STRUCTURE_NAME.
Regards
Rajkumar Narasimman