Using Function Module RS_CONV_EX_2_IN without a predefined structure

Question

HELLO,
In a SDN Blog  I have seen the FM 'RS_CONV_EX_2_IN' can be used to convert formatted char value to float.
I am trying this FM to convert some data but the final data format does not belong to an existing structure.
I have tried to define within the code but I keep getting  a 15 return code (invalid name)
What is wrong? Does this FM need a predefined structure to work?
Here is a code sample:
  TYPES: BEGIN OF OUT_PUT_TYPE_STRUC,
                value TYPE F,
         END OF OUT_PUT_TYPE_STRUC.
lv_tabfield-tabname   = 'OUT_PUT_TYPE_STRUC'.
lv_tabfield-fieldname = 'VALUE'.
PARAMETERS lv_value TYPE crm_imp_cell_value OBLIGATORY. u201CCHAR30
CALL FUNCTION 'RS_CONV_EX_2_IN'
  EXPORTING
    input_external               = lv_value
    table_field                  = lv_tabfield
  IMPORTING
    output_internal              = lv_cell_value
  EXCEPTIONS
    input_not_numerical          = 1
    too_many_decimals            = 2
    more_than_one_sign           = 3
    ill_thousand_separator_dist  = 4
    too_many_digits              = 5
    sign_for_unsigned            = 6
    too_large                    = 7
    too_small                    = 8
    invalid_date_format          = 9
    invalid_date                 = 10
    invalid_time_format          = 11
    invalid_time                 = 12
    invalid_hex_digit            = 13
    unexpected_error             = 14
    invalid_fieldname            = 15
    field_and_descr_incompatible = 16
    input_too_long               = 17
    no_decimals                  = 18
    invalid_float                = 19
    conversion_exit_error        = 20
    OTHERS                       = 21.
Thanks
Paul

Answer 1

HI Jovito,
Thanks for your help.
But the  out-put variable has the right type.
Here is the complete code that you can try.
I have tried two way for the input param.
Regards,
Paul
DATA lv_cell_value  TYPE f.
DATA lv_tabfield    TYPE tabfield.
DATA lv_value    TYPE char30 value '44,5'.
TYPES: BEGIN OF out_put_type_struc,
              value TYPE f,
       END OF out_put_type_struc.
lv_tabfield-tabname   = 'OUT_PUT_TYPE_STRUC'.
lv_tabfield-fieldname = 'VALUE'.
*PARAMETERS lv_value TYPE Char40 OBLIGATORY.
CALL FUNCTION 'RS_CONV_EX_2_IN'
  EXPORTING
    input_external               = lv_value
    table_field                  = lv_tabfield
  IMPORTING
    output_internal              = lv_cell_value
  EXCEPTIONS
    input_not_numerical          = 1
    too_many_decimals            = 2
    more_than_one_sign           = 3
    ill_thousand_separator_dist  = 4
    too_many_digits              = 5
    sign_for_unsigned            = 6
    too_large                    = 7
    too_small                    = 8
    invalid_date_format          = 9
    invalid_date                 = 10
    invalid_time_format          = 11
    invalid_time                 = 12
    invalid_hex_digit            = 13
    unexpected_error             = 14
    invalid_fieldname            = 15
    field_and_descr_incompatible = 16
    input_too_long               = 17
    no_decimals                  = 18
    invalid_float                = 19
    conversion_exit_error        = 20
    OTHERS                       = 21.
IF sy-subrc = 0 .
  WRITE lv_cell_value.
ELSE.
  WRITE: / 'error ' , sy-subrc.
ENDIF.