Confusion in loop inside loop

Question

Hi Experts,
i have some confution in below code:
here am trying to calculate  Actual Billing and Planned Revenue. but here for each value am looping it_final table inside the main loop.
but the prob is if i loop it_final for one value it is giving value, but if i try to loop 2 times for 2 values, it is not giving first value also.  
i.e if i comment loop for Planned Revenue then Actual Billing is displaying, if i try for 2 values, then its giving zeros for 2 values.
so could anyone check is there any mistake i did.
CLEAR: it_prps, it_final, wa_final, wa_it_prps.
  LOOP AT it_prps.
    CASE month.
      WHEN '08'.
  ACTUAL BILLING
        LOOP AT it_final INTO wa_final
         WHERE posid = it_prps-posid
            AND wrttp = c_04
            AND beltp = c_02
            AND versn = c_0
            AND ( vorga = c_coin OR vorga = c_rku2 ).
          CLEAR act_billing.
          IF sy-subrc IS INITIAL.
            MOVE wa_final-wlp08 TO t_act_billing.
            act_billing = act_billing + t_act_billing.
          ENDIF.
          CLEAR: it_prps, it_final.
        ENDLOOP.
*************PLANNED REVENUE
        LOOP AT it_final INTO wa_final
                         WHERE posid = it_prps-posid
                         AND wrttp = c_01
                         AND beltp = c_02
                         AND versn = c_0
                         AND ( vorga = c_sdor OR vorga = c_rkp5 ).
          CLEAR plan_rev.
          IF sy-subrc IS INITIAL.
            MOVE wa_final-wlp08 TO t_plan_rev.
            plan_rev = plan_rev + t_plan_rev.
          ENDIF.
          CLEAR: it_prps, it_final.
        ENDLOOP.
ENDCASE.
ENDLOOP.
WRITE:/10 'Actual Billing is',act_billing.
WRITE:/20 'Actual Cost is........', actu_cost.
Thanks in advace,
sudharsan.

Answer 1

Hi SUDHARSAN RAO
U r clearing the headers and tables. So u cannot use the values on the nested loops  as u have cleared the values. There wont be anything in the workare ur using in where clause.
Please see the below comments that I kept.
LOOP AT it_prps.
ACTUAL BILLING
LOOP AT it_final INTO wa_final
WHERE posid = it_prps-posid
AND wrttp = c_04
AND beltp = c_02
AND versn = c_0
AND ( vorga = c_coin OR vorga = c_rku2 ).
CLEAR act_billing.
IF sy-subrc IS INITIAL.
MOVE wa_final-wlp08 TO t_act_billing.
act_billing = act_billing + t_act_billing.
ENDIF.
CLEAR: it_prps, it_final.
Here IT_FINAL is cleared by u... should not be cleared
ENDLOOP.
*************PLANNED REVENUE
LOOP AT it_final INTO wa_final
WHERE posid = it_prps-posid
AND wrttp = c_01
AND beltp = c_02
AND versn = c_0
AND ( vorga = c_sdor OR vorga = c_rkp5 ).
CLEAR plan_rev.
IF sy-subrc IS INITIAL.
MOVE wa_final-wlp08 TO t_plan_rev.
plan_rev = plan_rev + t_plan_rev.
ENDIF.
Again ur clearing both tables.
CLEAR: it_prps, it_final.
ENDLOOP.
ENDCASE.
ENDLOOP.
WRITE:/10 'Actual Billing is',act_billing.
WRITE:/20 'Actual Cost is........', actu_cost.