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Q171272: FIX: SQL-SELECT into Array Causes Illegal Operation

Article: Q171272
Product(s): Microsoft FoxPro
Version(s): WINDOWS:5.0
Operating System(s): 
Keyword(s): kberrmsg kbvfp kbvfp500aFIX
Last Modified: 14-AUG-1999

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

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

SYMPTOMS
========

Using a SQL-SELECT statement to populate an array from a FoxPro 2x table
containing deleted records with DELETED set on causes the operating system to
close Visual FoxPro 5.0.

When running under Windows 95, the following error appears:

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

In Windows NT 4.0, the following error appears:

  An application error has occurred and an application error log is being
  generated.
  VFP.exe
  Exception: access violation <error number>, Address: <memory
  address>.

In both cases, the operating system then closes Visual FoxPro.

RESOLUTION
==========

Do not issue a SET DELETED ON command and simply rewrite the SQL-SELECT
statement, as in the following example:

     SELECT * FROM ZTEST INTO ARRAY Zjunk WHERE DELETED()=.F.

-or-

     SELECT * FROM ZTEST INTO ARRAY Zjunk WHERE !DELETED()

Also, the results of the SQL-SELECT statement could be directed to a destination
other than to an array.

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 5.0a and
does not occur in Visual FoxPro 3.x.

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

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

1. Run the following code in a program file or line by line from the Visual
  FoxPro Command window:

        CLEAR
        SET SAFETY OFF
        USE HOME()+"samples\data\customer.dbf" EXCLUSIVE
        COPY TO HOME()+"Ztest.dbf" TYPE FOX2X
        SET SAFETY ON
        CLOSE ALL
        USE HOME()+"Ztest.dbf"
        DELETE ALL FOR RECNO() < 10
        USE
        SET DELETED ON
        SELECT * FROM HOME()+"Ztest" INTO ARRAY Zjunk
        ? ALEN(zjunk)
        USE

Additional query words:

======================================================================
Keywords          : kberrmsg kbvfp kbvfp500aFIX 
Technology        : kbVFPsearch kbAudDeveloper kbVFP500
Version           : WINDOWS:5.0
Issue type        : kbbug
Solution Type     : kbfix

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