Error loading Radchart Image

[Deon Visser]

Hi

I have seen a few threads about this topic. None have helped me.
I only get this error on my production server. It occurs randomly. ie sometimes the radchart will display correctly and sometimes I will get this error. There is no pattern to the error.

My web.config contains

http handlers section
<add path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" validate="false" />

system.webserver section
<add name="ChartImage_axd" verb="*" preCondition="integratedMode" path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" />

Is their anything else I need to do?

[Deon Visser]

Hi

I was looking into a session timeout error with Reportviewer and came up with this which solved both problems. Radchart as well as reortviewer is now working fine. It seems changing the session state in web.config to......

cookieless = "false"
mode = "StateServer"
timeout = "xx"

does the trick.

[Ves]

Hello Deon,

The reason for this could be a web farm environment. The chart image is served by an HttpHandler, so it is possible that the page is handled by one machine and the httphandler request - by another. This way the httphandler will not be able to find the chart in the session. Setting the session state to state server mode ensures that the chart image is always found in the session.

Greetings,
Ves
the Telerik team

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[Deon Visser]

Hi Ves

Thank you for replying. No web farms though.

 

Regards