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Article ID: 221738 - Last Review: August 28, 2003 - Revision: 1.3
FIX: Memory Leak With SET SYSMENU OFF
This article was previously published under Q221738
If you repeatedly run a form and the system menu is set off, the following error may eventually occur:
There is not enough memory to complete this operation.
After that message appears, Visual FoxPro may have difficulty performing other tasks and report more insufficient memory messages.
Microsoft has confirmed that this is a bug in the Microsoft products that are 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:
194022 INFO: Visual Studio 6.0 Service Packs, What, Where, WhyÂ
(http://kbalertz.com/Feedback.aspx?kbNumber=194022/EN-US/
)
194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are InstalledÂ
(http://kbalertz.com/Feedback.aspx?kbNumber=194295/EN-US/
)
Steps to Reproduce Behavior
- Run the following code from a program (.prg) file:
CLEAR ALL
PUBLIC Pubrunform
Pubrunform=.T.
SET SYSMENU OFF
ON KEY LABEL ctrl+f8 _SCREEN.FORMS(1).RELEASE()
ON ESCAPE Pubrunform=.F.
X=1
DO WHILE Pubrunform=.T.
WAIT '' TIME .08 && take this out and get ox or forms
&& is not an object
ox=CREATEOBJECT('form')
ox.CAPTION = ALLTRIM(STR(X)) +' iterations - press escape to quit'
KEYBOARD '{ctrl+f8}'
ox.SHOW(1)
X=X+1
ENDDO
ON KEY LABEL ctrl+f8
SET SYSMENU TO DEFAULT
SET SYSMENU AUTO
ON ESCAPE
RETURN
- NOTE: If you get either of these messages press Ignore:
-or-
Eventually, you get the following error:
There is not enough memory to complete this operation.
The error usually occurs after about 500 iterations. The same behavior happens in Visual FoxPro 5.0a and 6.0.
If you look at the VFP6.exe file in the Windows NT 4.0 Task Manager, you will see the memory usage increase. However, two Visual FoxPro SYS() functions that look at memory usage, SYS(1016) and SYS(1011), do not increase.
The error does not occur without the SET SYSMENU OFF command.
APPLIES TO
- Microsoft Visual FoxPro 5.0a
- Microsoft Visual FoxPro 6.0 Professional Edition
| kbbug kbcontainer kbctrl kbfix kbvs600sp3fix KB221738 |
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