Curious problem with UBound for a multi-dim array?

[Mbee]

I don't understand why a UBound call isn't working correctly in one specific context (which I'll show below). But here's a test example where it's working perfectly:

#include <Array.au3>
#include <Constants.au3>
#include <StaticConstants.au3>
#include <Misc.au3>
#include <String.au3>
#include <StringConstants.au3>


Local $aArray[47][4]
Local $iNumRows = UBound($aArray, $UBOUND_ROWS)
Local $iNumCols = UBound($aArray, $UBOUND_COLUMNS)
Local $iNumDims = UBound($aArray, $UBOUND_DIMENSIONS)
Local $iSecondDimSize1 = UBound($aArray, 1)
Local $iSecondDimSize2 = UBound($aArray, 2)
;
MsgBox($MB_OK, "Array Dims", "$UBOUND_ROWS=" & $iNumRows & ", $UBOUND_COLUMNS=" & $iNumCols & ", $UBOUND_DIMENSIONS=" & $iNumDims & _
                ", iSecondDimSize1=" & $iSecondDimSize1 & ", iSecondDimSize2=" & $iSecondDimSize2)
Exit

The key datum that I need is returned by that final call, UBound($aArray, 2), to get the number of elements in the second dimension.  There it works perfectly.  But when I try it with a globally declared 2D array, as follows, UBound($aArray, 2) returns the same value as UBound($aArray, 1), which is WAY wrong.  Here's the code snippet where it malfunctions:

Func _MyAdjustFileInfoAra()
    Local $Lf_NumRows = UBound($G_FileListInfoAra, $UBOUND_ROWS)
    Local $Lf_NumCols = UBound($G_FileListInfoAra, $UBOUND_COLUMNS)
    Local $Lf_2ndDimSize = UBound($G_FileListInfoAra, 2)

Where that last call returns a very wrong value.  What's going on?  Weird, huh? Does it have something to do with the fact that it's global?

 

ETA: (Yes, the global array is already declared and filled before this)

Edited June 13, 2016 by Mbee
Added comment

[BrewManNH]

Instead of saying it's already declared, you need to show where it's declared and how. Right now you're asking us to recreate your script to troubleshoot a problem you're having that hasn't been reported previously. Without a working demonstration of the problem no one can diagnose it for you.

[Mbee]

I apolgize, I didn't realize that was important. Is the following all you need, or should I post more?

Global $G_FileListInfoAra[1][4]

; The size of the first dimension is ReDimmed prior to the problem code.  Let's say...
ReDim G_FileListInfoAra[47][4]

Otherwise, there are about 2 thousand lines of code in my app. Surely you don't want me to post it all, correct?

Edited June 13, 2016 by Mbee

[BrewManNH]

Post a reproducer script that demonstrates the issue. I don't need your whole script, just a runnable working script that shows the problem.