KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q221707: FIX: Trace Breaks Too Often With Breakpoint on SET("NULL")

Article: Q221707
Product(s): Microsoft FoxPro
Version(s): WINDOWS:5.0a,6.0
Operating System(s): 
Keyword(s): kbMiscTools kbvfp600 kbvfp600bug kbVS600sp3fix kbGrpDSFox kbDSupport
Last Modified: 25-JUN-1999

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

- Microsoft Visual FoxPro for Windows, versions 5.0a, 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

If a breakpoint is set in the Watch Window of the debugger with a value of a SET
setting, an executing program might break even though the value does not change.
For example, a breakpoint is set on SET("NULL").

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 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:

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

  Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

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

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

1. Set a breakpoint in the watch window on SET("NULL").

2. Create a program called MyProc.prg with the following code:

  Procedure MyProcedure
     For i = 1 To 100
        Wait Window Str(i) Nowait
     Endfor
  EndProc

3. In the Command window, type "Set Procedure To MyProc." (without the quotation
  marks)

4. Create a form with one CommandButton. In the CommandButton's Click event,
  enter the following code:

  Do MyProcedure

5. Run the form.

Note that the debugger causes the program to break execution.

Additional query words:

======================================================================
Keywords          : kbMiscTools kbvfp600 kbvfp600bug kbVS600sp3fix kbGrpDSFox kbDSupport 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600 kbVFP500a
Version           : WINDOWS:5.0a,6.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.