Hi, I found a bug, my MVC project is in a subfolder, and for this I have a problem with the ways I use "~" in order to specify the full path to take. and then I have a problem ReportViewer @ (this.Html.TelerikReporting () . ReportViewer () . Id ("reportViewer1") . ServiceUrl ("/api/reports/") . TemplateUrl ("/templates/template.html") . ReportSource (typeReportSource) . ViewMode (ViewModes.PRINT_PREVIEW) . ScaleMode (ScaleModes.SPECIFIC) . Scale (1.0) . PersistSession (false)) the fact that in this form . ServiceUrl ("/ api / reports /") . TemplateUrl ("/ themplate / themplate.html") operating normally. but it turns out that no subfolders. because it is taken still relative. in when the site is in a sub - I get a 404 error. ie ReportViewer script takes a relative path. and this is a big problem :) Once again, my ASP.NET MVC site is in a subfolder of another ASP.NET project. get something like: my site root url: mysite.com/project1 and pages: mysite.com/project1/myreportPage mysite.com/project1/api/reports