Why do I get the this error - "Read from unprogrammed EEPROM address"

Mu Code for HC12 is given below : 

USER_STACKTOP	equ	$0a00	;just above RAM area
PORTA		equ	$0000	;Port A register
PORTB		equ	$0001	;Port B register
PORTP		equ	$0056	;Port P register
DDRA		equ	$0002	;Port A Data Direction Register
DDRB		equ	$0003	;Port B Data Direction Register
DDRP		equ	$0057	;Port P Data Direction Register
INTCR		equ	$001e	;Interrupt Control Register
COPCTL          equ 	$0016   ;COP Control Register
TIOS		equ	$0080	;Timer Input Capture/Output Compare Select
TSCR		equ	$0086	;Timer System Control Register
TCTL1		equ	$0088	;Timer Control Register 1
TMSK1		equ	$008c	;Timer Interrupt Mask 1
TMSK2		equ	$008d	;Timer Interrupt Mask 2
TCNT		equ	$0084	;Timer Counter
TC7		equ	$009e	;Timer Input Capture/Output Compare Register 7
TFLG1		equ	$008e	;Timer Interrupt Flag 1

	org   	$0800
start   clr   	COPCTL
        lds   	#USER_STACKTOP
        
        movb	#$00,DDRA	;make Port A all inputs
        movb	#$ff,DDRB	;make Port B all outputs
        movb	#$00,DDRP	;make Port P all inputs
        
        movb	#$00,PORTB	;clear Port B
        
	movb	#$80,TIOS	;Set Timer 7 to output compare
	movb	#$05,TMSK2	;Prescalar = /32 = 250KHz clock
	movb	#$40,TCTL1	;Set Timer 7 output to toggle
	movb	#$80,TMSK1	;Enable interrupt for Timer 7 output compare

				;Set up Timer counter to output at 50ms intervals
	ldd   	TCNT 		;Load Timer Counter into D 
        addd	T7RATE		;Add T7RATE to D
	std   	TC7		;Store D to TC7H	
		
	movb	#$80,TSCR	;Enables timers
	
	movb	#$C0,INTCR	;enables IRQ interrupt

	cli			;clear interrupt mask - enable interrupts

backgnd nop
        bra   backgnd


Timer7IRQ:
	ldab  	TFLG1 		;just to read it
        ldab  	#$80 		;clear C7F in TFLG1
        stab  	TFLG1
        ldd   	TCNT 		;get entire TCNT at time of
                    		;external hi-to-low pulse
        staa  	PORTB 		;display hi-order TCNT

	ldd   	TCNT		;Load Timer Counter into D 
        addd	T7RATE		;Add T7RATE to D
	std   	TC7		;Store D to TC7H	

        rti

IRQ_ISR:
	ldab	INT_COUNT	;load data 
	incb			;increment data
	stab	INT_COUNT	;store data
	rti			;return from interrupt

	org  	$0900    
flags   dc.b  	$ff
INT_COUNT dc.b	$00		;Data element to increment in interrupt
T7RATE	dc.w	$30D4		;Rate of T7 Interrupts
        
	org  	$0b20  		
        dc.w  	Timer7IRQ

	org	$0b32
	dc.w	IRQ_ISR	   
					
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