title: HRESULT: 0x800A03EC - It works on my machine issue when creating Excel files
body: <p>I am creating an excel report using data coming from mssql server in my asp.net application. Here is my method:</p>
  
  <pre><code>[WebMethod]
  public static string ExportToExcel(string sourcetype)
  {
      Microsoft.Office.Interop.Excel.Application oXL;
      Microsoft.Office.Interop.Excel._Workbook oWB;
      Microsoft.Office.Interop.Excel._Worksheet oSheet;
      Microsoft.Office.Interop.Excel.Range oRng;
  
      try
      {
          oXL = new Microsoft.Office.Interop.Excel.Application();
          oXL.Visible = false;
  
          oWB = (Microsoft.Office.Interop.Excel._Workbook)(oXL.Workbooks.Add(Missing.Value));
          oSheet = (Microsoft.Office.Interop.Excel._Worksheet)oWB.ActiveSheet;
  
          List&lt;ExcelReport&gt; dataToExport = APIClient.GetExcelReportData(Utility.getCurrentFilterId(), sourcetype);
  
          oSheet.Cells[1, 1] = "Source";
          oSheet.Cells[1, 2] = "UserName";
          oSheet.Cells[1, 3] = "Name";
          oSheet.Cells[1, 4] = "Message";
          oSheet.Cells[1, 5] = "Title";
          //oSheet.Cells[1, 6] = "Date";
  
          int activeRow = 2;
  
          for (int i = 0; i &lt; dataToExport.Count; i++)
          {
              oSheet.Cells[activeRow, 1] = dataToExport[i].Source;
              oSheet.Cells[activeRow, 2] = dataToExport[i].UserName;
              oSheet.Cells[activeRow, 3] = dataToExport[i].Name;
              oSheet.Cells[activeRow, 4] = dataToExport[i].Message;
              oSheet.Cells[activeRow, 5] = dataToExport[i].MessageTitle;
              //oSheet.Cells[activeRow, 6] = dataToExport[i].EntityDate;
  
              activeRow++;
          }
  
          oSheet.get_Range("A1", "Z1").Font.Bold = true;
          oSheet.get_Range("A1", "Z1").VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter;
          oRng = oSheet.get_Range("A1", "Z1");
          oRng.EntireColumn.AutoFit();
          oXL.Visible = false;
          oXL.UserControl = false;
  
          string strFile = "report" + System.DateTime.Now.Ticks.ToString() + ".xls";
          string strCurrentDir = HttpContext.Current.Server.MapPath(".") + "\\ExcelReports\\";
          oWB.SaveAs(strCurrentDir + strFile, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, null, null, false,
              false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlShared, false, false, null, null, null);
          //oWB.SaveCopyAs(strCurrentDir + strFile);
          oWB.Close(null, null, null);
          oXL.Workbooks.Close();
          oXL.Quit();
          System.Runtime.InteropServices.Marshal.ReleaseComObject(oRng);
          System.Runtime.InteropServices.Marshal.ReleaseComObject(oXL);
          System.Runtime.InteropServices.Marshal.ReleaseComObject(oSheet);
          System.Runtime.InteropServices.Marshal.ReleaseComObject(oWB);
          oSheet = null;
          oWB = null;
          oXL = null;
          GC.Collect();  // force final cleanup!
  
          //errLabel.Text = "&lt;A href=http://" + strMachineName + "/ExcelGen/" + strFile + "&gt;Download Report&lt;/a&gt;";
          //string result = "&lt;a href=\"~/ExcelReports/" + strFile + "&gt;Raporu İndir&lt;/a&gt;";
          string result = "ExcelReports/" + strFile;
          return result;
      }
      catch (Exception theException)
      {
          String errorMessage;
          errorMessage = "Error: ";
          errorMessage = String.Concat(errorMessage, theException.Message);
          errorMessage = String.Concat(errorMessage, " Line: ");
          errorMessage = String.Concat(errorMessage, theException.Source);
  
          return errorMessage;
      }
  
  }
  </code></pre>
  
  <p>It works fine in my machine and at the server that application published to when I opened the source code in vs 2010 and press F5. But if I try to access my application using the browser through IIS, I'm getting HRESULT: 0x800A03EC error. </p>
  
  <p>I tried the following command:</p>
  
  <pre><code>appcmd set config -section:asp -enableParentPaths:true
  </code></pre>
  
  <p>I tried to give write permissions to my folder. </p>
  
  <p>I tried to change my MS Excel application settings from Component Services.</p>
  
  <p>But no way! I could not get it working. Do you have any idea? Am I doing a mistake in configuration?</p>
  
  <p>Thanks in advance,</p>