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Subscript used on non-accessible variable - Error message

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So here is the error:

 ==> Subscript used on non-accessible variable.:

Here is the code:

Func GetHandleFromPID($PID)
    Local $aReturn = _WinAPI_EnumProcessWindows($PID)
    Local $hReturn

    ;$hReturn = $aReturn[1][0]   ; this is the line that gives me the error "Subscript used on non-accessible variable"
    _ArrayDisplay($aReturn, "Handles")  ;but this line works fine (see screenshot below)
    Return $aReturn

The array seems to be there when I pass it to the _ArrayDisplay() function but in the prior line it gives me the error.


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I can only presume that when you get the error there has been no array returned from _WinAPI_EnumProcessWindows. It is always a good idea to check that an array actually exists before attempting to access its elements. ;)


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


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Thanks Melba23, that was the answer.  I was calling this function in a loop and I had an invalid PID so that is the one that was failing.  Anyway thanks for the reply.

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