Maybe this will help - I know posting code is a faux paux, I'll keep it short.

code:
function UserOU()
;Used for generating several variables - This is required.
 $userou = ""
 $sysinfo = createobject("adsysteminfo")
 if $sysinfo
  $user = getobject("LDAP://"+$sysinfo.username)
   if $user
    $name=getobject($user.parent).name
    if $name
    $userou = substr($name,4,len($name))
   endif
  endif
 endif
endfunction
This is the function that craps out when the file is larger than 31k. It is used in the body of the script in several ID sections such as this.

code:
;----------Houston
if INSTR($sysinfo.username, "Houston")<>0 $city="Houston" 
	gosub "display" 
	goto "houston" 
Endif
That help any? It's the only function I have.