System crash with CWAxis.AutoScaleNow in Measuremnt Studio 6.0 (previous version ok)

[Torsten Schultz]

hi,

we use in our application the Measurement Studio 6.0 (cwui.ocx 6.0.3.589)
the CNiGraph. A timer call will plot the online values every 200 ms by using
the method ChartXvsY. We also use the fix (from NI) for this function
located on the ftp server
(ftp://ftp.ni.com/support/mstudio/vc/fixes/6.0/ChartXvsY/) because without
the patch the method will call PlotXvsY instead of ChartXvsY.

If we use the method "CWAxis.AutoScaleNow" our application will crash after
a few minutes (Total crash, no blue screen, just system reboot, Windows 98
SE). If we replace the cwui.ocx version 6.0.3.589 with the previous version
3.0.3.549 (Measurement Studio 1.0 SP2) the same application (same system,
same
dlls and so, just replace the cwui.ocx in the system folder) the
application will run correctly.

Any idea???? We need help. We posted this problem to NI, but we are still
wating for an answer.

Torsten Schultz

[Torsten Schultz]

This is an example for the system crash. The example program will stop (or
crash) after a couple of minutes (2-3 minutes). If the default constructor
will use "CNiInterface::SingleThreaded" of the CNiGraph the crash will be
after 10 to 12 minutes. This problem is only under Windows 98, not with
Windows 2000. Only the "cwui.ocx" version 6.0 will cause the problem.

void CGraphExampleDlg::OnTimer(UINT nIDEvent)
{
// some code here, llok at graph example

// the following lines are added
m_Graph.Axes.Item("YAxis-1").Ticks.Inside = false;
m_Graph.Axes.Item("YAxis-1").Ticks.Outside = true;

m_Graph.Axes.Item("YAxis-1").Ticks.Above = false;
m_Graph.Axes.Item("YAxis-1").Ticks.Right = false;
m_Graph.Axes.Item("YAxis-1").Labels.Above = false;

m_Graph.Axes.Item("YAxis-1").Inverted = false;
m_Graph.Axes.Item("YAxis-1").Log = false;

m_Graph.Axes.Item("YAxis-1").Ticks.MajorTicks = true;
m_Graph.Axes.Item("YAxis-1").Ticks.MinorTicks = false;

m_Graph.Axes.Item("YAxis-1").Maximum = 1;
m_Graph.Axes.Item("YAxis-1").Minimum = -1;

// if the following line was removed, there is no problem
m_Graph.Axes.Item("YAxis-1").AutoScale = true;

m_Graph.Axes.Item("YAxis-1").Labels.Left = true;
m_Graph.Axes.Item("YAxis-1").Labels.Right = true;

m_Graph.Axes.Item("YAxis-1").Ticks.Left = true;
m_Graph.Axes.Item("YAxis-1").Ticks.Right = true;

CDialog::OnTimer(nIDEvent);
}


Need help!

Greetings Torsten



"Torsten Schultz" schrieb im Newsbeitrag
news:3ce35042@newsgroups....
> hi,
>
> we use in our application the Measurement Studio 6.0 (cwui.ocx 6.0.3.589)
> the CNiGraph. A timer call will plot the online values every 200 ms by
using
> the method ChartXvsY. We also use the fix (from NI) for this function
> located on the ftp server
> (ftp://ftp.ni.com/support/mstudio/vc/fixes/6.0/ChartXvsY/) because without
> the patch the method will call PlotXvsY instead of ChartXvsY.
>
> If we use the method "CWAxis.AutoScaleNow" our application will crash
after
> a few minutes (Total crash, no blue screen, just system reboot, Windows 98
> SE). If we replace the cwui.ocx version 6.0.3.589 with the previous
version
> 3.0.3.549 (Measurement Studio 1.0 SP2) the same application (same system,
> same dlls and so, just replace the cwui.ocx in the system folder) the
> application will run correctly.
>
> Any idea???? We need help. We posted this problem to NI, but we are still
> wating for an answer.
>
> Torsten Schultz
>
>







[Attachment nigraph.zip, see below]

[Greg Wempe]

Torsten -

Thanks for using the Developer Exchange to post your question. I hope you have found it useful thus far and will continue to take advantage of this forum to communicate with fellow developers.

In reference to your autoscale question, we have been recently alerted to this issue and are currently in the process of fixing it. Using code very similar to what you posted, I was able to reproduce the error on a Windows 98 machine while having an identical program function perfectly on a Windows 2000 machine. I passed the information along to our R&D department, and they are beginning the task of repairing the behavior.

If you should have any more questions, please feel free to contact us. I would recommend using http://www.ni.com/ask to get expedite
d support via the phone or e-mail from our engineers here. Thanks again for your continued support of National Instruments!

Best Regards,

Greg Wempe
Applications Engineer
National Instruments
http://www.ni.com/ask