Microsoft KB Archive/221734

Knowledge Base

C0000005 fatal error with invalid property name in Visual FoxPro

Article ID: 221734

Article Last Modified on 1/27/2005

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APPLIES TO

• Microsoft Visual FoxPro 6.0 Professional Edition

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This article was previously published under Q221734

SYMPTOMS

You receive the following error mesage and Visual FoxPro exits:

Fatal error: Exception code = C0000005

This behavior occurs when attempting to access an invalid property of an object.

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 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

MORE INFORMATION

Steps to reproduce the behavior

The following steps require Microsoft Outlook to be installed on the computer that is running Visual FoxPro.

1. Create a program named Getitems.prg using the following code:

      oTraverse = CREATEOBJECT("traverseoutlook")
      oTraverse.BeginTraverse
   
      DEFINE CLASS TraverseOutlook AS CUSTOM
         nNestingLevel = 0
         oOutLookObject = NULL
         olNameSpace = NULL
   
         PROCEDURE INIT
            WITH THIS
               .oOutLookObject = CREATEOBJECT("Outlook.Application")
               .olNameSpace = .oOutLookObject.GetNameSpace("MAPI")
            ENDWITH
         ENDPROC
   
         PROCEDURE BeginTraverse
            LOCAL folder
            FOR EACH folder ;
                  IN THIS.olNameSpace.Folders
               THIS.ProcessFolder(folder)
            NEXT folder
         ENDPROC
   
         PROCEDURE ProcessFolder(subfolder)
            * The valid property is THIS.nNestingLevel
            THIS.NestingLevel = THIS.NestingLevel + 1
            ?REPLICATE(CHR(9),THIS.NestingLevel-1),subfolder.NAME
            FOR EACH folder IN subfolder.Folders
               THIS.ProcessFolder(folder)
            NEXT folder
            FOR EACH ITEM IN subfolder.Items
               ?REPLICATE(CHR(9),THIS.NestingLevel),ITEM.subject
            NEXT ITEM
            THIS.NestingLevel = THIS.NestingLevel - 1
         ENDPROC
      ENDDEFINE
                           

2. In the Command window, type the following:

   DO GETITEMS
                       

3. Visual FoxPro terminates after displaying the following error message:

   Fatal error: Exception code = C0000005

4. Replace the ProcessFolder (subfolder) code with the following code:

      THIS.nNestingLevel = THIS.nNestingLevel + 1
      ?REPLICATE(CHR(9),THIS.nNestingLevel-1),subfolder.NAME
      FOR EACH folder IN subfolder.Folders
         THIS.ProcessFolder(folder)
      NEXT folder
       FOR EACH ITEM IN subfolder.Items
         ?REPLICATE(CHR(9),THIS.nNestingLevel),ITEM.subject
      NEXT ITEM
      THIS.nNestingLevel = THIS.nNestingLevel - 1
                           

5. In the Command window, type the following:

         DO GETITEMS
                       

6. Note that Visual FoxPro outputs information to the screen as the Outlook folder hierarchy is traversed.

Additional query words: kbDSE

Keywords: kbbug kbfix kboop kbvs600sp1fix kbautomation kbvs600sp2fix kbvs600sp3fix KB221734

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