Article: Q158755
Product(s): Microsoft FoxPro
Version(s): WINDOWS:5.0
Operating System(s):
Keyword(s): kberrmsg
Last Modified: 24-MAR-2000
-------------------------------------------------------------------------------
The information in this article applies to:
- Microsoft Visual FoxPro for Windows, version 5.0
-------------------------------------------------------------------------------
SYMPTOMS
========
If there are objects that reference each other, Visual FoxPro displays the
following error message when CLEAR ALL is carried out:
This Program has performed an illegal operation and will be shut down.
Visual FoxPro terminates due to an Invalid Page Fault.
WORKAROUND
==========
Delete object references before carrying out CLEAR ALL.
STATUS
======
Microsoft has confirmed this to be a problem in the Microsoft products listed at
the beginning of this article. This has been corrected in Visual FoxPro 6.0.
MORE INFORMATION
================
Steps to Reproduce Behavior
---------------------------
1. Create and run a program containing the following code:
oform = CreateObject( "Form" )
oform.AddObject("X", "CB")
oform.AddObject("Y", "CB")
oform.y.pointer=oform.x
oform.x.pointer=oform.y
CLEAR ALL && This causes an Invalid Page Fault and
&& shuts down Visual FoxPro.
DEFINE CLASS CB as CommandButton
pointer= .NULL.
ENDDEFINE
Object references for "X" and "Y" above can be cleared by doing the following:
oform.removeobject("X")
oform.removeobject("Y")
Additional query words: vfoxwin kbdsd kbvfp500 kbvfp600fix
======================================================================
Keywords : kberrmsg
Technology : kbVFPsearch kbAudDeveloper kbVFP500
Version : WINDOWS:5.0
Issue type : kbbug
Solution Type : kbfix
=============================================================================