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Q221745: FIX: C0000005 Fatal Error Using GETPEM() in Loop with Debugger

Article: Q221745
Product(s): Microsoft FoxPro
Version(s): WINDOWS:6.0
Operating System(s): 
Keyword(s): kbMiscTools kbvfp600 kbVS600sp3 kbGrpDSFox kbDSupport kbVS600sp4fix kbVS600sp5fix
Last Modified: 26-JUL-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

Placing the GetPem() function in a loop while tracing the code more than once in
the Debugger causes the following error in Visual FoxPro 6.0:

  Fatal error: Exception code: C0000005

Note that the error message also contains information regarding the line number
of the program running when the error occurred.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug was corrected in the next service pack for
Visual Studio 6.0.

For additional information about Visual Studio service packs, click the article
numbers below to view the articles in the Microsoft Knowledge Base:

  Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

  Q194295 HOWTO: Tell That a Visual Studio Service Pack Is Installed

You can download the latest Visual Studio service pack from the following
Microsoft Web site:

  Visual Studio Product Updates
  (http://msdn.microsoft.com/vstudio/downloads/updates.asp)


MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a program called Ztest.prg that contains the following code:

  DO doit
  CLEAR ALL
  DO doit

  PROC doit
  	SET EXACT ON
  	oForm = CREATEOBJECT( "Form" )
  	oForm.ADDOBJECT("lbl1", "label")
  	FOR EACH loObject IN oForm.OBJECTS
  		m = AMEMBERS( laMembers, loObject )
  		lcClass = loObject.CLASS
  		FOR j = 1 TO m
  		IF ( ! pemstatus( loObject, laMembers[j], 1 ) )
  		luClassValue = getpem( lcClass, laMembers[j] )
  			ENDIF
  		ENDFOR
  	ENDFOR
  ENDPROC

2. Close and save the program.

3. Open the Debugger and open the Ztest.prg file.

4. In the Debugger, click the Resume toolbar button.

The C0000005 error appears.
You can also get this error by simply running the code in the example above. In
Visual FoxPro 6.0, if you run the program using either the DO command or by
pressing the Run button (!) on the standard toolbar with the program open, the
C0000005 error appears. In Visual FoxPro 6.0 Service Pack 3, only the DO command
causes the error.

Additional query words: sp4

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Keywords          : kbMiscTools kbvfp600 kbVS600sp3 kbGrpDSFox kbDSupport kbVS600sp4fix kbVS600sp5fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

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