LENGTH() function in bteq - response (3) by MBR

Thanks for reply.
But CHARACTER_LENGTH is also not working. I have used CHAR_LENGTH() as well but it is also giving error.
the below error i am getting while running the script through BTEQ.
 *** Failure 3580 Illegal use of CHARACTERS, MCHARACTERS, or OCTET_LENGTH fu
 nctions.
                Statement# 1, Info =0
 *** Total elapsed time was 1 second.