Hi sapscript pl help

Question

hi all
my code is given below::
data:
    zlv_netpr type netpr,
    zlv_netwr type netwr, 
    zlv_diff     type netpr,
  Loop at TABLE in_tab.
    case in_tab-name.
       when 'ITAB-NETPR'.
          MOVE in_tab-value TO zlv_netpr.   "  HERE I AM GETTING ERROR.'
*( in_tab-value is an amount field in sapscript.)
       when 'ITAB-NETWR'.
          MOVE in_tab-value TO zlv_netwr.
    endcase.
  endloop.
zlv_diff = zlv_netpr - zlv_netwr.
  READ TABLE out_tab with key name = 'ITAB-DIFF' .
  out_tab-value = zlv_diff.
  MODIFY out_tab INDEX sy-tabix.
the above code is in the calling program of PERFORM.
I AM GETTING ERROR and error is 'in_tab-value'  cannot be interprete as number.
i am passing amout field from SAPSCRIP FORM to calling program i.e. 'PERFORM AND FORM'  INSIDE FORM. 
I HAVE TO CALCULATE IN SIDE 'FORM' OF CALLING PROG, BUT IT IS GIVING ERROR- CANNOT CONSIDER AS NUMBER.
IF I CHANGE THE DATA TYPE OF PASSING FIELDS TO CHAR THEN I AM NOT ABLE TO DO CALCULATION .
PL CORRECT THE ABOVE CODE SO THAT I CAN DO CALCULATIONS.
PL HELP AS THIS HAS BEEN PENDING FOR LONG.
THANX
ROCKY

Answer 1

Hi rocky..
try this out...
data:
zlv_netpr type c,
zlv_netwr type c,
zlv_diff type c.
Loop at  in_tab.
case in_tab-name.
when 'ITAB-NETPR'.
MOVE in_tab-value TO zlv_netpr. " HERE I AM GETTING ERROR.'
*( in_tab-value is an amount field in sapscript.)
when 'ITAB-NETWR'.
MOVE in_tab-value TO zlv_netwr.
endcase.
endloop.
the fields of in_tab and out_tab are always character types...
try to move into  zlv_netpr of type c of sufficient length.
let me know if it helps u..
sai ramesh