RunWait command does not return the exit code of the program that was run on XP systems

[PTim]

I have observed that the RunWait function does not return the exit code of the program that was run on Windows XP SP3 systems.
It runs fine on Windows 7 SP1.

I have 2 test script samples:
mytest.bat - which will return exit code 99 if "file.exe" is present in the current working directory
Exit1.au3 - which uses the RunWait function to call mytest.bat, and capture the exit code returned in $Result.
$Result is set to 100 prior to calling RunWait.

When the compiled Exit1.exe runs on Windows 7 - the behaviour is as expected - either a 99 or 1 is displayed as the value of $Result.
When the same Exit1.exe runs of Windows XP - $Result is always 0.

I have discussed this on the forum, however there have been no solutions identified to-date.
Thread: RunWait behaviour on XP and W7

I have also observed the same behaviour using the following other functions: ShellExecuteWait and _RunDos.

[PTim]

Sample AutoIt test file to show the issue

[PTim]

Sample batch file that Exit1.au3 calls via RunWait

[PTim]

Please close this bug. A poster on the forum assisted in identifying that the issue is OS related rather than Autoit.
Apologies

[anonymous]

the forum thread (mentioned above) would be: ​https://www.autoitscript.com/forum/topic/178468-runwait-behaviour-on-xp-and-w7/