How to call a function module in VC

Question

Hi,
I want to call a function module for an addition formula which shall calculate and infer the value.
eg. quantities of 5 different characteristics (of numeric data) is to be summed up and inferred against the 6th characteristic.
I want to know the detailed process to create a Variant Function and use it in a dependency.
Request to please advise the steps, type of dependency and its code.
Regards,
Rajesh Mohapatra

Answer 1

Dear Rajesh,
I also wanted to learn how to do that, your post motivated me to use a bit of freetime and investigate on the subject. I finally made my function work, so here are the tips.
The example is very simple, just a variant function with two inputs and which multiplies inside the input values and transfer that result to the output ( 3 x 4 => 12 ).
Deducting how to add five values or any other logic would be easier starting from there.
STEP 1: Create Variant Class for the product. I imagine you already have that. In my case its name is ZVC_CLASS, you have already a material assigned to the class, a configuration profile, etc....
STEP 2: Create Three Characteristics Z_NUM_CH_1,Z_NUM_CH_2,Z_NUM_CH_3 the three of numeric type
STEP 3: Assign characteristics from step 2 into class ZVC_CLASS
STEP 4: Create the function module with the code given below. I put the name ZVC_FUN_TEST
FUNCTION ZVC_FUN_TEST.
""Interfase local
*"  IMPORTING
*"     REFERENCE(GLOBALS) TYPE  CUOV_00
*"  TABLES
*"      QUERY STRUCTURE  CUOV_01
*"      MATCH STRUCTURE  CUOV_01
*"  EXCEPTIONS
*"      FAIL
*"      INTERNAL_ERROR
*- Inicializar los valores.
  DATA:
  GV_VALOR_FINAL        TYPE CUOV_01-ATFLV,
  GV_VALOR_NUM1         TYPE CUOV_01-ATFLV,
  GV_VALOR_NUM2         TYPE CUOV_01-ATFLV.
  CLEAR:
    gv_valor_final,
    gv_valor_num1,
    gv_valor_num2.
CALL FUNCTION 'CUOV_GET_FUNCTION_ARGUMENT'
    EXPORTING
      ARGUMENT            =  'Z_NUM_CH_1'
    IMPORTING
     VTYPE               =  P_VTYPE1
     SYM_VAL             =  P_VALOR_SYM1
      NUM_VAL             =  gv_valor_num1
  IO_FLAG             =
    TABLES
      QUERY               =  QUERY
    EXCEPTIONS
      ARG_NOT_FOUND       = 01.
  IF SY-SUBRC <> 0.
    RAISE INTERNAL_ERROR.
  ENDIF.
CALL FUNCTION 'CUOV_GET_FUNCTION_ARGUMENT'
    EXPORTING
      ARGUMENT            =  'Z_NUM_CH_2'
    IMPORTING
     VTYPE               =  P_VTYPE1
     SYM_VAL             =  P_VALOR_SYM1
      NUM_VAL             =  gv_valor_num2
  IO_FLAG             =
    TABLES
      QUERY               =  QUERY
    EXCEPTIONS
      ARG_NOT_FOUND       = 01.
  IF SY-SUBRC <> 0.
    RAISE INTERNAL_ERROR.
  ENDIF.
*- Calculate final value
  gv_valor_final = gv_valor_num1 * gv_valor_num2.          "Especifico de c/u.
DATA: VTYPE TYPE CUOV_01-ATFOR.
VTYPE = 'NUM'.
CALL FUNCTION 'CUOV_SET_FUNCTION_ARGUMENT'
    EXPORTING
      ARGUMENT                = 'Z_NUM_CH_3'
      VTYPE                   = VTYPE
      NUM_VAL                 =  gv_valor_final
    TABLES
      MATCH                   = MATCH
    EXCEPTIONS
      EXISTING_VALUE_REPLACED = 01.
  IF SY-SUBRC <> 0.
    RAISE INTERNAL_ERROR.
  ENDIF.
ENDFUNCTION.
STEP 5: Activate the function module for Variant Configuration in transaction CU65, put there your function module, release int and in button characteristics write  Z_NUM_CH_1,Z_NUM_CH_2,Z_NUM_CH_3. Flag the first two lines as they are inputs.
STEP 6: Create a Dependency ZVC_PROC_TEST of type Procedure to call the function with this code:
000010 Function ZVC_FUN_TEST           
000020 (Z_NUM_CH_1 = $root.Z_NUM_CH_1, 
000030 Z_NUM_CH_2 = $root.Z_NUM_CH_2,  
000040 Z_NUM_CH_3 = $self.Z_NUM_CH_3)  
STEP 7: Lets say I want to calculate the multiplication only upon the selection of another characteristic "Calculate" YES/NO. For this I create a characteristic in CT04 Z_CALCULATE type CHAR 1 with possible values Y or N. For the value Y y add the procedure ZVC_PROC_TEST so that formula only activates on Y.
STEP 8: Add characteristic Z_CALCULATE to class  ZVC_CLASS
STEP 9: VA01, it should work