We have successful integrated Telerik Reporting into our product and this is running as expected at a number of client sites. However, the integration is failing at a single client site. Our solution uses the ReportViewer control which we've added to a basic .aspx page. As part of our investigation we removed all the code-behind, and established that it was the following tag that was preventing the page from loading.
<telerik:ReportViewer runat="server" ID="ReportViewer1"Width="100%" Height="700px" BorderStyle="None" > </telerik:ReportViewer>
The error message doesn't reveal anything other than an error has occurred.
The .aspx page exists within a SharePoint site, and we have confirmed that the<SafeControl> tags are correct, and that the Telerik DLLs are correctly present in the GAC. As part of the investigation we installed the Telerik Designer and ran the failing reports successfully in the designer, preview the clients data in the report.
I would guess there is some security setting in the browser that is preventing the ReportViewer control from loading. Is there any configuration or restrictions for this component? Are there any Telerik logs that may reveal what the error is?