title: SSRS local report fails - error "An error has occurred during report processing"
body: <p>I am running ReportViewer 10 using a local report (rdl) file in an MVC web site. I am passing in a DataSet that has the correct data with column names that match the report definition.</p>
  
  <pre><code>        var reportDataSource = new ReportDataSource("dataset1", resultSet);
  
          ReportViewer1.LocalReport.ReportPath = Server.MapPath("/Reports/Report2.rdl");
          ReportViewer1.LocalReport.DataSources.Clear();
          ReportViewer1.LocalReport.DataSources.Add(reportDataSource);
  
          List&lt;ReportParameter&gt; lst = new List&lt;ReportParameter&gt;();
          ReportParameter rptParam1 = new ReportParameter("Id", "54");
          lst.Add(rptParam1);
          ReportViewer1.LocalReport.SetParameters(lst);
  
          ReportViewer1.LocalReport.Refresh();
  </code></pre>
  
  <p>The error I am getting is:</p>
  
  <p><img src="https://i.stack.imgur.com/TiPrE.png" alt="enter image description here"></p>
  
  <p>I am unable to find any more specific information on the exact error.
  Is there a log file somewhere I can look at? </p>
  
  <p>Thank you.</p>