KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q157988: FIX: Illegal Operation Caused by Clicking on Blank Index

Article: Q157988
Product(s): Microsoft FoxPro
Version(s): WINDOWS:5.0
Operating System(s): 
Keyword(s): kbtool kbvfp kbvfp500aFIX kbvfp500bugkbbuglist kbfixlist
Last Modified: 11-DEC-1999

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

- Microsoft Visual FoxPro for Windows, version 5.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

The following message appears when clicking on a blank index in the Table
Designer after removing the field the index was based on.

  This program has performed an illegal operation and will be shut down.

This happens if there is only one index for the table, and that index is based on
a field that has been removed.

STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products listed at
the beginning of this article. fix

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

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

1. Use the Table Designer to create a table called Test with two character
  fields called char1 and char2.

2. Click the Indexes tab and create an index called char1 on field char1.

3. Click OK. You can add a few records if you wish.

4. Type MODIFY STRUCTURE in the Command window.

5. In the Fields tab of the Table Designer select the first field char1, and
  click Delete. (You must click the Delete button in the dialog box rather than
  the press the Delete key on the keyboard.)

6. Click the Indexes tab and then click in the blank outlined field under Name.

The error message "This program has performed an illegal operation and will be
shut down." Appears. When you click Close, Visual FoxPro closes.

Additional query words: gpf general protection fault

======================================================================
Keywords          : kbtool kbvfp kbvfp500aFIX kbvfp500bug kbbuglist kbfixlist
Technology        : kbVFPsearch kbAudDeveloper kbVFP500
Version           : WINDOWS:5.0
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.