KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q192977: FIX: Table Allows Modification Although DBC is Opened NOUPDATE

Article: Q192977
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0,3.0b,5.0,5.0a
Operating System(s): 
Keyword(s): 
Last Modified: 20-AUG-1999

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

- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 5.0, 5.0a 
-------------------------------------------------------------------------------

SYMPTOMS
========

If you open a database in Visual FoxPro with the NOUPDATE option of the OPEN
DATABASE command, and then you modify the structure of a table contained in that
database, you can save changes to the table structure. This can cause the
database to become invalid.

RESOLUTION
==========

In the versions of Visual FoxPro previous to 6.0, do not modify a table
structure if the OPEN DATABASE command uses the NOUPDATE argument.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug has been corrected in Visual FoxPro 6.0.

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

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

1. Run the following code from a program (.PRG) file:

        CLEAR
        CLOSE DATABASE ALL
        SET SAFETY OFF
        CREATE DATABASE 'TESTDB.DBC'
        CREATE TABLE 'TESTTAB.DBF' NAME 'TESTTAB' (CFIELD C(3) NOT NULL)
        CLOSE DATABASE ALL
        OPEN DATABASE testdb NOUPDATE
        USE testtab EXCLUSIVE
        MODIFY STRUCTURE
        VALIDATE DATABASE

2. When the Table Designer displays, create an index on the Cfield field and
  then click the OK button.

3. Click Yes in the confirmation dialog to make the changes permanent.

4. Click OK in the "Cannot update cursor" error dialog box.

NOTE: The VALIDATE DATABASE command yields an error that the newly created index
is missing from the database container.

REFERENCES
==========

(c) Microsoft Corporation 1998, All Rights Reserved.
Contributions by Jim Saunders, Microsoft Corporation


Additional query words: kbVFp300bbug kbVFp500abug kbVFp600fix KbDBFDBC kbDatabase kbXBase

======================================================================
Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b kbVFP500 kbVFP500a
Version           : WINDOWS:3.0,3.0b,5.0,5.0a
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.