i have this code is code in assembly but when I debug its giving me this error in this line: mov r$9$w$,[$rdx $+$ r$8*2]$

here is the code:

average$\_$volume PROTO

$.$data

$.$code

average$\_$volume PROC

; RCX is the pointer to the block

; RDX is the size of the block

; Setting rax to $0$ for clearer readibility when viewing process

mov rax, $0$

; Exchanging value so that I can use the loop instruction

xchg rdx$,$ rcx

; RDX is know the pointer to the block and RCX the size, to begin a loop instruction

; R$8$ is an index of the position being modified or used in the traversal of the array

; starts at $0$ and ends at n $-1$

mov r$8,0$

; The size of each block is limited to $65536,$ for the purpose of this code it is more

; than enough, since each block is of size $2205$ or less

mov r$10,$ rcx

; Summing the absolutes values of the entire block

L$1$:

; Grabbing the value at the $[$r$8]$th positon from memory

mov r$9,0$

; this line is giving an error of access violation!!!!!!

mov r$9$w$,[$rdx $+$ r$8*2]$

; Checking if the value is negative, we only want positive values

cmp r$9$w$,0$

jl abs

end$\_$abs:

; R$9$ should now have the absolute values of the entire block

add rax, r$9$

inc r$8$

loop L$1$

; Computing average of block, separating the dividend into dx:ax for proper use of division function

; This is done since eax, contains the result of the sum of the absolute values of all values

; in the block, and we need the average

mov cx$,$ ax

shr rax, $16$

mov dx$,$ ax

mov ax$,$ cx

div r$10$w

ret

; If it is negative convert to a positive value

abs:

neg r$9$w

jmp end$\_$abs

average$\_$volume ENDP

END