Convertion from Char to Hex

Hi Experts,
I have a requirement to convert char type to Hex type.
I have two structures. one is Character type and other is hex type like below.
data: v_hex(300) type h,
        v_char(300) type c.
When we move v_char(300) to v_char(300), it is working fine in 4.6 system.
But it is giving unicode error in ECC 6.0. So i have changed the statement to v_hex = v_char.
There is no syntax error but it is not converting the same.
Please post your replies. Thanks in advance.

REPORT  ZSRK_039                                .
DATA: V_HEX(300) TYPE X,
      V_CHAR(300) TYPE C.
V_CHAR = 'Test'.
PERFORM CHAR_TO_HEX_CONV USING V_CHAR
                         CHANGING V_HEX.
WRITE : / V_HEX.
*&      Form  CHAR_TO_HEX_CONV
      text
     -->P_V_CHAR  text
     <--P_V_HEX  text
FORM CHAR_TO_HEX_CONV  USING    CH TYPE C
                       CHANGING CH1 TYPE X.
  FIELD-SYMBOLS : <FS_TR> TYPE X.
  ASSIGN CH TO <FS_TR> CASTING TYPE X .
  CH1 = <FS_TR>.
ENDFORM.                    " CHAR_TO_HEX_CONV

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