RegRead fails for the first try reading a key

[funkey]

When I change the key for example from 'DeviceConnect' to 'DeviceFail' then I get an error from RegRead (only) for the first time. You can see it at the Console. I use Windows XP SP2 and Autoit V3.3.0.0

_PlayDefaultSystemSound('DeviceConnect', 1)

; #FUNCTION# ====================================================================================================================
; Name...........:    _PlayDefaultSystemSound()
; Description ...:    Plays a Default System Sound
; Syntax.........:    _PlayDefaultSystemSound($sSoundName, $iWait = 0)
; Parameters ....:    $sSoundName                - Name des SystemSound's
;                    | Default                   - Standardton Warnsignal / Default Beep
;                    | CriticalBatteryAlarm      - Alarm bei kritischem Batteriestand / when battery is critical
;                    | DeviceConnect            - Geräteanschluß / when a device is connect
;                    | DeviceDisconnect          - Gerätetrennung / when a device is disconnect
;                    | DeviceFail                - Geräteanschluß fehlgeschlagen / when a deviceconnect is fail
;                    | LowBatteryAlarm           - Alarm bei niedrigem Batteriestand / when battery is low
;                    | MailBeep                  - Posteingangsbenachrichtigung / when email is received
;                    | SystemAsterisk            - Stern / Asterisk
;                    | SystemExclamation         - Hinweis / when windows shows a warning
;                    | SystemExit                - Windows beenden / when Windows shuts down
;                    | SystemHand                - Kritischer Abbruch / when a critical stop occurs
;                    | SystemNotification        - Sprechblase / when a critical stop occurs
;                    | SystemStart               - Windows starten / when Windows starts up
;                    | WindowsLogoff             - beim Windows abmelden / when logging off Windows
;                    | WindowsLogon              - beim Windows anmelden / when logging on Windows
;                    | EmptyRecycleBin           - Löschen des Papierkorbs / when recycle bin is emptied
;                    | Navigating                - Browser Klick / navigating in browser

;                     $iWait                     - Wait until SoundPlay ends? (0 = no / 1 = yes)
; Return values .:    -----
; Author ........:    funkey (AutoIt.de)
; ===============================================================================================================================

Func _PlayDefaultSystemSound($sSoundName, $iWait = 0)
    ; funkey
    Local $sKey = 'HKEY_USERS\.Default\AppEvents\Schemes\Apps\.Default'
    If $sSoundName = 'EmptyRecycleBin' Or $sSoundName = 'Navigating' Then $sKey = 'HKEY_USERS\.Default\AppEvents\Schemes\Apps\Explorer'
    ConsoleWrite(RegRead($sKey &'\' & $sSoundName & '\' & '\.Default', '')&@CRLF&@error&@CRLF)    ;Output to Console
    Local $sFile = StringReplace(RegRead($sKey &'\' & $sSoundName & '\' & '\.Default', ''), '%SystemRoot%', @WindowsDir)
    If $sFile = "" Then
        SoundPlay(StringReplace(RegRead($sKey &'\.Default\.Default', ''), '%SystemRoot%', @WindowsDir), $iWait)
    Else
        SoundPlay($sFile, $iWait)
    EndIf
EndFunc   ;==>_PlaySystemSound

[anonymous]

check your registry, it worked for me on the first try (and other tries after that).

[funkey]

The registry is fine, the keys exist. I checked it on several computer and other users from Autoit.de have the same problem.
For the first time RegRead fails for each key it reads, then it works fine until you logoff Windows or restart your PC.

Another example for testing:

Local $aSounds[15] = ['.Default', _
			'CriticalBatteryAlarm', _
			'DeviceConnect', _
			'DeviceDisconnect', _
			'DeviceFail', _
			'LowBatteryAlarm', _
			'MailBeep', _
			'SystemAsterisk', _
			'SystemExclamation', _
			'SystemExit', _
			'SystemHand', _
			'SystemNotification', _
			'SystemStart', _
			'WindowsLogoff', _
			'WindowsLogon']

For $i = 0 To UBound($aSounds) -1
	ConsoleWrite(RegRead('HKEY_USERS\.Default\AppEvents\Schemes\Apps\.Default\' & $aSounds[$i] & '\' & '\.Default', '')&@CRLF&@error&@CRLF)
Next

[Valik]

Very strange. I tried the script and the first run returned empty strings with @error set to 1. All subsequent attempts worked. In short, I can reproduce the issue on Windows XP SP3.

[Jpm]

I don"t know why XP behave this way but you get an extra '\'
If you remove it everything is OK

	ConsoleWrite(RegRead('HKEY_USERS\.Default\AppEvents\Schemes\Apps\.Default\' & $aSounds[$i] & '\.Default', '')&@CRLF&@error&@CRLF)

[Valik]

I said that I could reproduce this bug so you do not need to be closing it.

If the extra \ actually mattered, it would always fail. It doesn't always fail, it fails in a very strange manner. Give me some time to look into this further, please.

[Valik]

I'm closing this as no bug. The error returned is ERROR_INVALID_PARAMETER (The parameter is incorrect). The error is accurate because of the extra "\" in the key name. I have a theory as to why it works sometimes and doesn't work other times but it's rather technical and pretty much irrelevant since it's not a bug we can fix. If there is a bug here, it's in the Windows API for not rejecting the key every time.