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In the help file for _Singleton it says:

#include <Misc.au3>
_Singleton ( $sOccurrenceName [, $iFlag = 0] )


$sOccurrenceName String to identify the occurrence of the script. This string may not contain the \ character unless you are placing the object in a namespace (See Remarks).


My problem is that I have no idea where to find the string that identifies the occurrence of the script. I tried the name of the script as this seemed most logical.

If _Singleton("QuickAccess.a3x",1) = 0 Then
        MsgBox(0,"QuickAccess.a3x","This is already running")
        MsgBox(0,"QuickAccess.a3x","This was not found")

This seemed to work, but then I tried a different script name which wasn't running and got the same result. It said the non existant script was running... So I decided that I hadn't understood the use of the _singleton function which I think would be more helpful than the WinExists as described by Argumentum above. In the help file it uses the string "test". This is obviously not the full script name so I tried the name before the extension and got the same unhelpful results.

Then I tried a different test and it told me that none of the scripts were found even though two were running.


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I did another test and that gave even more strange results.

Func TestSingleton()

    $a = "Launch"
    $b = "QuickAccess"
    $c = "RunTempMMexe"
    Dim $Files[3] = [$a, $b, $c]
For $I = 0 To 2
    If _Singleton("QuickAccess",1) = 0 Then
        MsgBox(0,$Files[$I],"This is already running")
        MsgBox(0,$Files[$I],"This was not found")

It only went through the loop twice and for the SAME text gave two different results.

>"C:\Program Files (x86)\AutoIt3\SciTE\..\AutoIt3.exe" "C:\Program Files (x86)\AutoIt3\SciTE\AutoIt3Wrapper\AutoIt3Wrapper.au3" /run /prod /ErrorStdOut /in "U:\Documents\.......\Test.au3" /UserParams    
+>14:00:18 Starting AutoIt3Wrapper v.15.920.938.0 SciTE v.   Keyboard:00000809  OS:WIN_81/  CPU:X64 OS:X64    Environment(Language:0809)
+>         SciTEDir => C:\Program Files (x86)\AutoIt3\SciTE   UserDir => C:\Program Files (x86)\AutoIt3\SciTE\AutoIt3Wrapper
>Running AU3Check (  from:C:\Program Files (x86)\AutoIt3  input:U:\Documents\....\Test.au3
+>14:00:18 AU3Check ended.rc:0
>Running:(\Program Files (x86)\AutoIt3\autoit3.exe "U:\Documents\......\Test.au3"    
--> Press Ctrl+Alt+Break to Restart or Ctrl+Break to Stop
+>14:00:36 AutoIt3.exe ended.rc:0
+>14:00:36 AutoIt3Wrapper Finished.
>Exit code: 0    Time: 19.38

I look forward to any explanation you have.



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Ok... so i ended up typing the few lines myself to be able to test. This works fine for me:

#include <misc.au3>
$Scriptname = @ScriptName
If _Singleton($Scriptname, 1) = 0 Then
    ConsoleWrite($Scriptname & " is already running" & @CRLF)
    ConsoleWrite($Scriptname & " is Not running" & @CRLF)


Edited by Jos

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OK. I think that my problem was that I misunderstood the aim of _singleton. It allows a script to detect if the script itself is already running, the value of the string you use is irrelevant - any string will do.

I was hoping to be able in one script to detect if another script was running and for that I need to use WinExists.


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