Help with code, crashing

[Jouster]

Hi, I am wrinting a porgram for my assembly class and this little snippet keeps crashing and I don't understnd why. Could someone please point out what I am doing wrong?

; Program Description:Uses a procedure to contantenate two strings. Must have available space in target string.
; Date Created:4/25/04
; Last Modification Date:

INCLUDE Irvine32.inc

Str_concat PROTO,
ptrSourceTR BYTE,
ptrTargetTR BYTE

.data

targetStr BYTE "ABCDE", 10 DUP(0)
sourceStr BYTE "FGH", 0

.code
main PROC
INVOKE Str_concat, ADDR targetStr, ADDR sourceStr
exit ; exit to operating system
main ENDP

Str_concat PROC,
ptrSourceTR BYTE,
ptrTargetTR BYTE

Str_concat ENDP

; (insert additional procedures here)

END main

 

[Thazager]

Need a 'ret' command before endp of Str_concat. All procedures need ret except main, which has exit. Cant see all the code, but also looks like you're missing 'start' and 'end start'.

Thaz