FIX: Table Allows Modification Although DBC is Opened NOUPDATE

• 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.

REFERENCES

© Microsoft Corporation 1998, All Rights Reserved.
Contributions by Jim Saunders, Microsoft Corporation

Additional query words: kbVFp300bbug kbVFp500abug kbVFp600fix KbDBFDBC kbDatabase kbXBase

Keywords :
Version : WINDOWS:3.0,3.0b,5.0,5.0a
Platform : WINDOWS
Issue type : kbbug