this is a 3 bit calculator circuit done on mplabx ide. When building(running) the program it shows build error. Can someone run and fix the problem?

include " p18f452.inc "

org 0x00

add1 equ 0x20

sub1 equ 0x21

div1 equ 0x22

mul1 equ 0x23

num1 equ 0x24

num2 equ 0x25

num3 equ 0x26

remainder equ 0x27

divisor equ 0x28

quotient equ 0x29

dividend equ 0x30

goto main

main: clrf trisd

clrf trisc

setf trisb

movlw 0x00

movwf add1

movlw 0x40

movwf div1

movlw 0x80

movwf sub1

movlw 0xC0

movwf mul1

movlw 0x00

movwf portd

movwf portc

up: movf portb,w

andlw 0xC0

cpfseq add1

bra check1

bra add

check1: cpfseq sub1

bra check2

bra sub

check2: cpfseq div1

bra check3

bra div

check3: cpfseq mul1

bra up

bra mul

add:movf portb,w

movwf num3

andlw 0x38

movwf num1

rlncf num1

rlncf num1

rlncf num1

rlncf num1

rlncf num1

movf num3,w

andlw 0x07

addwf num1,0,0

movwf portd

bra up

sub:movf portb,w

movwf num3

andlw 0x38

movwf num1

rlncf num1

rlncf num1

rlncf num1

rlncf num1

rlncf num1

movf num3,w

andlw 0x07

subwf num1,0,0

movwf portd

bra up

mul: movf portb,w

movwf num3

andlw 0x38

movwf num1

rlncf num1

rlncf num1

rlncf num1

rlncf num1

rlncf num1

movf num3,w

andlw 0x07

mulwf num1

movf prodl,w

movwf portd

bra up

div:movf portb,w

movwf divisor

andlw 0x38

movwf dividend

rlncf dividend

rlncf dividend

rlncf dividend

rlncf dividend

rlncf dividend

movf divisor,w

andlw 0x07

movwf divisor

clrf quotient

clrf remainder

incf quotient

up1: subwf dividend

cpfslt dividend

incf quotient

movff dividend,remainder

cpfslt dividend

bra up1

movff quotient, portd

movff remainder , portc

end