Why I am getting error "The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)".
This is happening when below code is executed.
try {                 xlWorkBook = xlApp.Workbooks.Open(IDRFFile, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows,"\t", false, false, 0, true, 1, 0); } catch (Exception ex) {
}
StackTrace:   at Microsoft.Office.Interop.Excel.Workbooks.Open(String Filename, Object UpdateLinks, Object ReadOnly, Object Format, Object Password, Object WriteResPassword, Object IgnoreReadOnlyRecommended, Object Origin, Object Delimiter, Object Editable, Object Notify, Object Converter, Object AddToMru, Object Local, Object CorruptLoad)   &nbs ...

Go to the complete details ...