We were abe to reproduce the error with Microsoft's Session object so no longer consider this to be a problem with TeeChart. We will invetigate our web farm and may switch to using a database in the web farm to store session state between shared servers.

When using a trial version of TeeChart, dragging the control onto the report layout in Visual Studio gives the following error :"The custom report item type TeeChart is not installed." There's a similar thread on this issue and it suggests following the instructions in Readme_TeeChartReportingServic...

I have followed the tutorial and have been able to display a chart using GetChart.aspx and either the Session, Cache or Httphandler methods described. I have only not tried the file method. After sometimes 5, sometimes 50 requests, the chart will not render and just a red x will be displayed. This w...