Data type doubled on dynamic table

Hello Everyone,
I'm creating a Z program to insert data to any Z table created, for that, the user must put the name of the Z table and the path of the file with all data to be inserted.
The problem is that on dynamic table creation the datatype of the fields are doubled, I.E.: if the datatype is N length 3, it's coming as N length 6.
Does anyone know to solve this issue?
Thanks in Advance!

Hi
Just as I said, if u need to create a table like a dictionary table u can use the standard fm DDIF_FIELDINFO_GET in order to get the informations, so it doesn't need to calculate the real size.
My system is unicode too, and I used the fm above to create dynamically a structure based on dictionary definition:
LOOP AT VAKE_DFIES_TAB INTO DFIES WHERE FIELDNAME <> 'KFRST' AND
                                          FIELDNAME <> 'KBSTAT'.
    COMPONENT-NAME = DFIES-FIELDNAME.
    MOVE DFIES-LENG     TO _LEN.
    MOVE DFIES-DECIMALS TO _DEC.
    CASE DFIES-DATATYPE.
      WHEN 'CHAR' OR 'LANG' OR 'CUKY'.
        MOVE CL_ABAP_ELEMDESCR=>GET_C( P_LENGTH = _LEN )
                                                      TO LR_VALUE_DESCR.
      WHEN 'NUMC'.
        MOVE CL_ABAP_ELEMDESCR=>GET_N( P_LENGTH = _LEN )
                                                      TO LR_VALUE_DESCR.
      WHEN 'INT1' OR 'INT2' OR 'INT4'.
        MOVE CL_ABAP_ELEMDESCR=>GET_I( ) TO LR_VALUE_DESCR.
      WHEN 'DATE'.
        MOVE CL_ABAP_ELEMDESCR=>GET_D( ) TO LR_VALUE_DESCR.
      WHEN 'DEC' OR 'CURR'.
        MOVE CL_ABAP_ELEMDESCR=>GET_P( P_LENGTH   = _LEN
                                       P_DECIMALS = _DEC )
                                                      TO LR_VALUE_DESCR.
      WHEN 'TIME'.
        MOVE CL_ABAP_ELEMDESCR=>GET_T( ) TO LR_VALUE_DESCR.
      WHEN 'UDEF'.
    ENDCASE.
    COMPONENT-TYPE = LR_VALUE_DESCR.
    INSERT COMPONENT INTO TABLE LT_COMPONENTS.
ENDLOOP.
IF SY-SUBRC <> 0.
    PERFORM RAISE_ERROR USING 'C'.
ENDIF.
* Creazione struttura chiave
LR_STRUCT_DESCR
        = CL_ABAP_STRUCTDESCR=>CREATE( P_COMPONENTS = LT_COMPONENTS
                                       P_STRICT     = 'X' ).
CREATE DATA DYN_VAKEY TYPE HANDLE LR_STRUCT_DESCR.
ASSIGN DYN_VAKEY->* TO <FS_VAKEY>.
Max

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\Checking for color change \FloatTestOn: -0.3382032 <- "a" is no longer there ?
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Data type doubled on dynamic table

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