Wrong Parameters error after call opcode in Assembly 8086 (emulator8086)

Question

I'm trying to make a function (procedure) in Assembly x86 but for some reason the call opcode gives me the "wring parameters" error

; <somecode>

    call max   ; --> gives an error

    int 0x16
    ret

max proc:  

; <some code>

    ret
max endp

I don't see the problem here but I might be missing something. What's the cause for this error?

Answer 1

The trailing : on max proc: is your problem. proc declarations aren't labels like foo:

I don't know why the error would show up on a call to it, unless it's for an undefined symbol, but EMU8086's built-in assembler is not very good.