/// <summary>
        /// Validate XLS file for COBie errors, also will swap templates if required
        /// </summary>
        /// <param name="parameters">Params</param>
        /// <returns>Created file name</returns>
        private void ValidateXLSfile(Params parameters, ICOBieValidationTemplate ValidationTemplate = null)
        {

            //read xls file
            LogBackground(String.Format("Reading {0}....", parameters.ModelFile));
            COBieXLSDeserialiser deSerialiser = new COBieXLSDeserialiser(parameters.ModelFile);
            COBieWorkbook Workbook = deSerialiser.Deserialise();

            //extract pick list from the template sheet and swap into workbook (US / UK)
            LogBackground("Swapping PickList from template...");
            COBieSheet<COBiePickListsRow> CobiePickLists = null;
            if ((!string.IsNullOrEmpty(parameters.TemplateFile)) &&
                File.Exists(parameters.TemplateFile)
                )
            {
                //extract the pick list sheet from template
                COBieXLSDeserialiser deSerialiserPickList = new COBieXLSDeserialiser(parameters.TemplateFile, Constants.WORKSHEET_PICKLISTS);
                COBieWorkbook wbookPickList = deSerialiserPickList.Deserialise();
                if (wbookPickList.Count > 0) CobiePickLists = (COBieSheet<COBiePickListsRow>)wbookPickList.FirstOrDefault();
                //check the workbook last sheet is a pick list
                if (Workbook.LastOrDefault() is COBieSheet<COBiePickListsRow>)
                {
                    //remove original pick list and replace with templates
                    Workbook.RemoveAt(Workbook.Count - 1);
                    Workbook.Add(CobiePickLists);
                }
                else
                {
                    LogBackground("Failed to Swap PickList from template...");
                }

            }

            COBieContext context = new COBieContext(_worker.ReportProgress);
            COBieProgress progress = new COBieProgress(context);
            context.Exclude = UserFilters;

            //Validate
            progress.Initialise("Validating Workbooks", Workbook.Count, 0);
            progress.ReportMessage("Building Indices...");
            foreach (ICOBieSheet<COBieRow> item in Workbook)
            {
                item.BuildIndices();
            }
            progress.ReportMessage("Building Indices...Finished");

            // Validate the workbook
            progress.ReportMessage("Starting Validation...");

            Workbook.Validate(ErrorRowIndexBase.RowTwo, null, (lastProcessedSheetIndex) =>
            {
                // When each sheet has been processed, increment the progress bar
                progress.IncrementAndUpdate();
            });
            progress.ReportMessage("Finished Validation");
            progress.Finalise();

            // Export
            LogBackground(String.Format("Formatting as {1} using {0} template...", Path.GetFileName(parameters.TemplateFile), parameters.IsXLSX ? "XLSX" : "XLS"));
            COBieXLSXSerialiser serialiser = new COBieXLSXSerialiser(parameters.ModelFile, parameters.TemplateFile);
            serialiser.Excludes = UserFilters;
            serialiser.IsXlsx = parameters.IsXLSX;
            serialiser.Serialise(Workbook, ValidationTemplate);

            LogBackground(String.Format("Export Complete: {0}", parameters.ModelFile));

            Process.Start(serialiser.FileName);

            LogBackground("Finished COBie Validation");


        }
        /// <summary>
        /// Create XLS file from ifc/xbim files
        /// </summary>
        /// <param name="parameters">Params</param>
        private void GenerateCOBieFile(Params parameters)
        {
            string outputFile = Path.ChangeExtension(parameters.ModelFile, ".xls");
            Stopwatch timer = new Stopwatch();
            timer.Start();
            COBieBuilder builder = GenerateCOBieWorkBook(parameters);
            timer.Stop();
            LogBackground(String.Format("Time to generate COBie data = {0} seconds", timer.Elapsed.TotalSeconds.ToString("F3")));

            // Export
            LogBackground(String.Format("Formatting as {1} using {0} template...", Path.GetFileName(parameters.TemplateFile), parameters.IsXLSX ? "XLSX" : "XLS"));
            COBieXLSXSerialiser serialiser = new COBieXLSXSerialiser(outputFile, parameters.TemplateFile);
            serialiser.Excludes = UserFilters;
            serialiser.IsXlsx = parameters.IsXLSX;
            builder.Export(serialiser);

            LogBackground(String.Format("Export Complete: {0}", outputFile));

            Process.Start(serialiser.FileName);

            LogBackground("Finished COBie Generation");
        }