Error justifytext lisp

[vnanhvu]

I HAVE A LISP, BUT I USE IT DISPLAY ERROR: NO FUNCTION DEFINITION: CT:JTEXT

CAN YOU HELP ME !

HAVE A NICE DAY !

;LENH JUSTIFYTEXT : DOI DIEM CHEN CUA DTEXT VA MTEXT

(defun c:JA () (CT:JTEXT "A"));DOI DIEM CHEN CUA TEXT THANH ALIGN
(defun c:JC () (CT:JTEXT "C"));DOI DIEM CHEN CUA TEXT THANH CENTER
(defun c:JF () (CT:JTEXT "F"));DOI DIEM CHEN CUA TEXT THANH FIT
(defun c:JL () (CT:JTEXT "L"));DOI DIEM CHEN CUA TEXT THANH LEFT
(defun c:JM () (CT:JTEXT "M"));DOI DIEM CHEN CUA TEXT THANH MIDDLE
(defun c:JR () (CT:JTEXT "R"));DOI DIEM CHEN CUA TEXT THANH RIGHT

[BlackBox]

For your code to work, you need to first define the "CT:JTEXT" function.