Is there any other solution in Excelpackage in C# (Using OfficeOpenXml in EPPlus.dll)

Question

i used EPPlus.dll as my library in creating Excel sheets. But using these codes, i got an error: Exception thrown: 'System.NullReferenceException' in ExcelReports.cs:line 37

            28. String filename = "D:\\" + MonthYear + "_journal.xls";
            29. FileInfo template = new FileInfo("D:\\template_journal.xls");
            30. if (File.Exists(filename))
            31. {
            32.    File.Delete(filename); 
            33. }
            34. FileInfo newFile = new FileInfo(filename);
            35. ExcelPackage pck = new ExcelPackage(newFile, template);
            36. ExcelWorksheet journalsheet = pck.Workbook.Worksheets["Journal"];
            37. journalsheet.Cells["C1"].Value = "Sample Value";
            38. pck.Save();