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Q221721: FIX: Mismatched Pushjmp/Popjmp With DataToClip( ) On Big Table

Article: Q221721
Product(s): Microsoft FoxPro
Version(s): WINDOWS:5.0a,6.0
Operating System(s): 
Keyword(s): kberrmsg kbservicepack kbContainer kbCtrl kbvfp600 kbvfp600bug kbVS600sp2 kbVS600SP1 kb
Last Modified: 21-MAY-1999

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The information in this article applies to:

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

The following error message:

  Mismatched Pushjmp/Popjmp Call

appears in Visual FoxPro 6.0 when attempting to copy the contents of a large
table to the clipboard after executing the following command from a form:

  _VFP.DATATOCLIP(,,1)

Visual FoxPro, 5.0a running on Windows NT 4.0, produces the following Dr. Watson
error:

  An application error has occurred
  and an application error log is being generated.
  VFP.exe
  Exception access violation (0xc0000005), Address: <memory address>

Visual FoxPro 5.0a, running on Windows 95, produces the following error:

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

Clicking the Details button reveals the following:

  VFP caused an invalid page fault in module VFP.EXE at <memory address>

STATUS
======

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

This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information
about Visual Studio service packs, please see the following articles in the
Microsoft Knowledge Base:

Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

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

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

1. Create a large table (approximately 5Mb in size).

2. Create a new form named Lg_Table.

3. Add the large table to the DataEnvironment of the form.

4. Add a command button to the form.

5. Add the following code in the Click event of the command button:

  _VFP.DATATOCLIP(,,1)

6. Run the form and click the command button. The following error message can
  appear:

  OLE exception error: Exception code c0000005. OLE object may be corrupt.

  Click the Ignore button and the following message appears:

  Mismatched pushjmp/popjmp call

  A memory protection fault may also occur.

Additional query words:

======================================================================
Keywords          : kberrmsg kbservicepack kbContainer kbCtrl kbvfp600 kbvfp600bug kbVS600sp2 kbVS600SP1 kbVS600sp3fix kbGrpDSFox 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600 kbVFP500a
Version           : WINDOWS:5.0a,6.0
Issue type        : kbbug
Solution Type     : kbfix

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