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Q157050: PRB: Loops of @..SAY <General field> Causes GPF

Article: Q157050
Product(s): Microsoft FoxPro
Version(s): 3.00 3.00b 5.00
Operating System(s): 
Keyword(s): kberrmsg kbvfp300 kbvfp500 kbvfp600
Last Modified: 29-JUL-1999

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 5.0, 6.0 
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SYMPTOMS
========

WARNING: The information in this article has not been confirmed or tested by
Microsoft. Some or all of the information in this article has been taken from
unconfirmed customer reports. ANY USE BY YOU OF THE INFORMATION PROVIDED IN THIS
ARTICLE IS AT YOUR OWN RISK. Microsoft provides this information "as is" without
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties of merchantability and/or fitness for a particular
purpose.

Looping @...SAY <general field contain embedded pictures> might cause a
General Protection Fault (GPF) in Windows 3.1 and Windows for Workgroups, and it
might trigger one of the following error messages:

  VFP caused an invalid page fault in module kernal32.dll at <address>"
  under Windows 95

  -or-

  Application Error : Access violation : <address> under Winnt3.51

WORKAROUND
==========

Instead of displaying a Picture from the general field, issue the following
command:

  

  @...SAY <Picture File name> Bitmap

STATUS
======

Microsoft is researching this behavior and will post new information here in the
Microsoft Knowledge Base as it becomes available.

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

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

1. Create a Table (name it Test) with a general field (name it Pic).

2. Embed a .bmp file into the general field Pic.

3. Execute the program as follows:

  

        CLOSE data
        SELECT 0
        USE Test
        DO while .t.
        @ 1,1 SAY Pic
        ENDDO

The amount of time the loop runs varies depending on your processor, memory, and
operating system.

Additional query words: kbdse vFoxWin

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Keywords          : kberrmsg kbvfp300 kbvfp500 kbvfp600 
Technology        : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b kbVFP500 kbVFP600
Version           : 3.00 3.00b 5.00

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

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