; Find the sum and average for trapeziod arrays.

area_stats macro areas, len, asum, aave
local asum_lp
mov cx, len
lea bx, areas
mov asum, 0
asum_lp:
mov ax, word ptr[bx]
add asum, ax
add bx, 2
dec cx
cmp cx, 0
jg asum_lp
mov ax, asum
mov dx, 0
div len
mov aave, ax

endm

This is the envocation of the macro-
trap_areas height1, a_side1, c_side1, len1, areas1

These are the data declarations-
a_side1 db 10, 15, 10, 13, 14, 17, 10, 6, 13, 11
b_side1 db 15, 2, 13, 6, 12, 16, 7, 12, 10, 12
c_side1 db 11, 12, 3, 9, 7, 6, 17, 6, 1, 5
height1 db 4, 12, 11, 3, 8, 12, 14, 13, 18, 9
areas1 dw 10 dup (?)
perims1 dw 10 dup (?)
len1 dw 10
asum1 dw ?
aave1 db ?
psum1 dw ?
pave1 dw ?

These are the errors the assembler gives me. I am using MASMv6.
asst5.asm(225) : error A2070: invalid instruction operands
area_stats(15): Macro called from
asst5.asm(225): main line code

I have 5 of these when i try to assemble.

Any help would be greatly appreciated.

I would like to help but I have not used masm yet.
Is that masmv6 assembler part of Visual Studio or is it separate?
Does it come with XP Home?
Do you use it on the command line or IDE?

Are you saying that this is the invocation at line 225?:
Which is supposed to calling this macro?:Those names don't match. Is that the right line 225?
The number of args don't match either.