TeeChart6 Data Limitations

DCS · Post by **DCS** » Mon Mar 22, 2004 1:15 am

Can you tell me the maximum allowable data items that are allowed in TeeChart 5 ActiveX control.

I have12 series and am adding "Live" data via the AddRealTime method.
When my data count reaches approx. 200,000 points per series, my program is giving me a teechart.ocx error. Up to that point, the chart runs great.

I am using Labview 7.0 from National Instruments as my development language. I have also upgraded to the TeeChart 6 ActiveX control but the problem still exists.

Any suggestions??

Post by **Pep** » Mon Mar 22, 2004 5:59 pm

Hi,

Can you tell me the maximum allowable data items that are allowed in TeeChart 5 ActiveX control.

Maximum 134217727 points per Series and same number of Series per Chart.

When my data count reaches approx. 200,000 points per series, my program is giving me a teechart.ocx error. Up to that point, the chart runs great.

Does the example under :
C:\Program Files\Steema Software\TeeChart Pro v6 ActiveX Control\Examples\Visual Basic\Visual Basic 5 & 6\FastLine AddRealTime
crashes ?

DCS · Post by **DCS** » Tue Mar 23, 2004 2:56 pm

Since I am using Labview as my programming environment, the VB examples cannot be explicitly used. However, I am using code that follows the same principals as the VB example and am having the error occur.

Post by **Pep** » Wed Mar 24, 2004 5:05 pm

Hi,

I'm sorry, I'm not very familiar with LabView but if you can post the link where I can download an eval version of it (LabView) I'll try to see which is the problem.

DCS · Post by **DCS** » Wed Mar 24, 2004 10:47 pm

Here's the link:

http://www.ni.com/labview/

Thank You

employee · Post by **employee** » Wed Apr 21, 2004 2:57 pm

Hi,
I've run into the exact same limitation while using TeeChart5. I use the ActiveX control in an MFC application and after plotting live data, I always get the TeeChart ocx error after approximately 6 hours. I sample data every 50 ms and of course, the time it takes to crash is dependent on how many series I am plotting. The 6 hours is with 8 series. Our requirements are that we must be able to display 8 hours of plotted data and with a maximum of 16 series. Is this feasible.

Thanks

Post by **Christopher** » Mon Apr 26, 2004 12:15 pm

Hi --

I've run into the exact same limitation while using TeeChart5. I use the ActiveX control in an MFC application and after plotting live data, I always get the TeeChart ocx error after approximately 6 hours. I sample data every 50 ms and of course, the time it takes to crash is dependent on how many series I am plotting. The 6 hours is with 8 series. Our requirements are that we must be able to display 8 hours of plotted data and with a maximum of 16 series. Is this feasible.

It should be. How many series points are there in your 8 series when the program crashes? What, exactly, is the error you receive?

employee · Post by **employee** » Fri Apr 30, 2004 1:43 pm

Hello again,
While trying to create a test program to duplicate the problem, I found out what was happening. The problem was caused by our data acquisition routines. Whoever wrote the code originally didn't check if they were dereferencing the STL iterator end. For some reason though, I used to get an access violation in Teechart5.ocx. Ran some more tests the last few days, and I was able to plot 16 hours of data without a problem.

Thanks

TeeChart6 Data Limitations

TeeChart6 Data Limitations

Data Limitations

Labview Link