Microsoft KB Archive/223113

= FIX: EXE Crashes When For...Each Loop Iterates Through Array Returned by Property Get Procedure =

Article ID: 223113

Article Last Modified on 5/13/2003

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APPLIES TO


 * Microsoft Visual Basic 6.0 Learning Edition
 * Microsoft Visual Basic 6.0 Professional Edition
 * Microsoft Visual Basic 6.0 Enterprise Edition

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This article was previously published under Q223113



SYMPTOMS
When using a For...Each loop to iterate through an array that was returned from a Property Get procedure, you receive the following error message:

The instruction at "0x6610d3b1" referenced memory at "0x00131004". The memory could not be "read".

NOTE: The error occurs when the code is called from an EXE that was compiled to native code, but does not occur when called from an EXE that was compiled to p-code. The error does not occur when you execute the code in the Visual Basic IDE.



RESOLUTION
You can work around the problem using one of the following alternative methods:
 * Compile the EXE to p-code.
 * Copy the result of the Property Get procedure to a dynamic array, and then use the dynamic array in the For...Each loop.



STATUS
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3.

For more information about Visual Studio 6.0 Service Packs, please see the following articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed



Steps to Reproduce Behavior
 Create a new Standard EXE project. Form1 is created by default.  In the code module for Form1, add the following code: Private sSeasons As String

Property Get SeasonsProp As String SeasonsProp = sSeasons End Property

Private Sub Form_Initialize ReDim sSeasons(3) sSeasons(0) = "Spring" sSeasons(1) = "Summer" sSeasons(2) = "Autumn" sSeasons(3) = "Winter" End Sub

Private Sub Form_Load Dim x As Variant Dim fForm1 As Form1

Set fForm1 = New Form1

MsgBox "Before arrays" For Each x In fForm1.SeasonsProp MsgBox "Item: " + x   Next End Sub  Compile the EXE and run it.

You should see a message box that displays "Before arrays," and then you will receive the error message described in the SYMPTOMS section of this article. To fix the problem:

 Select "Compile to P-Code" on the Compile tab of the Project Properties, and then recompile.

-or-  Change the sample Form_Load event to the following: Private Sub Form_Load Dim x As Variant Dim fForm1 As Form1 Dim sTemp As String

Set fForm1 = New Form1 sTemp = fForm1.SeasonsProp

MsgBox "Before arrays" For Each x In sTemp MsgBox "Item: " + x   Next End Sub </ul> </li></ol>

Keywords: kbbug kbfix kbcompiler kbvs600sp3fix KB223113

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