While loop not being executed

[Eigensheep]

I'm almost certain there's an obvious answer, but can someone tell me why in the following script I am not getting anything written to the output window in SciTE and I get a blank MsgBox, but a valid return value? Thanks!

#include <Constants.au3>
;...

$file_loc = @ScriptDir & "\test.au3"
$file_au3 = $file_loc
$foo = RunWait('"' & @ScriptDir & '\Autoit3\au3check.exe" "' & $file_au3 & '"',"", @SW_HIDE, $STDERR_CHILD+$STDOUT_CHILD)
ConsoleWrite('"' & @ScriptDir & '\Autoit3\au3check.exe" "' & $file_au3 & '"')
MsgBox(64,"Return value is",$foo)
$errch = ""

While 1
$line = StdoutRead($foo)
If @error Then ExitLoop
$errch = $errch & $line
ConsoleWrite("I can't even see this line...")
WEnd

MsgBox(64,"",$errch)
;...

[Jos]

You are using Runwait() in stead of Run()

[PsaltyDS]

You are using Runwait() in stead of Run()

He seems to want both the STDOUT and the EXITCODE. So something like lod3n's _RunReadStd() might be appropriate.