[code]#include <Inet.au3>
$url = "you url"
$avNames=""
Func check()
$avNames = _INetGetSource($url)
EndFunc

While (True)
Sleep(5000)
check()
FileWrite("log.txt",$avNames)
WEnd
[/code]

this code working without you error  :oui:
try add sleep
if still get same error share full code