Google Sheets Email - Vlookup showing REF value in PDF - google-apps-script

Question

Hoping you could help me with this, I have created a system that automatically sends the current sheet as an attachment in an email with body and subject text.
I have one problem that I cant seem to solve; the Vlookup used in the sheet generates either a blank column or a REF! on the emailed PDF. And any info directing to another value from a different sheet (eg ='Sheet2'!D2)
Here is the code used on the sheet triggering the PDF attachment :
function mailCCB() {
var originalSpreadsheet = SpreadsheetApp.getActive(); //get active spreadsheet
var message = "Good Day." + "\n\n" + "Please find attached certificate"; //email body
var certNo = originalSpreadsheet.getRange("C7").getValue(); //certificate number
var cust = originalSpreadsheet.getRange("E10").getValues(); //customer name
var subject = "Certificate " + certNo + " | " + cust; //email subject
var emailTo = originalSpreadsheet.getRange("E13").getValue(); //email address
var sheets = originalSpreadsheet.getSheets(); //get all sheets
var sheetName = originalSpreadsheet.getActiveSheet().getName(); //get current sheet name
var sourceSheet = originalSpreadsheet.getSheetByName(sheetName); //source sheet
// Get folder containing spreadsheet to save pdf in.
var parents = DriveApp.getFileById(originalSpreadsheet.getId()).getParents();
if (parents.hasNext()) {
var folder = parents.next();
}
else {
folder = DriveApp.getRootFolder();
}
SpreadsheetApp.getActiveSpreadsheet().toast("Working on it.. 50%", "Busy",12);
// Copy whole spreadsheet.
var destSpreadsheet = SpreadsheetApp.open(DriveApp.getFileById(originalSpreadsheet.getId()).makeCopy("tmp_convert_to_pdf", folder))
// Delete redundant sheets.
var sheets = destSpreadsheet.getSheets();
for (i = 0; i < sheets.length; i++) {
if (sheets[i].getSheetName() != sheetName){
destSpreadsheet.deleteSheet(sheets[i]);
}
}
var destSheet = destSpreadsheet.getSheets()[0];
var sourceRange = sourceSheet.getRange(1,1,sourceSheet.getMaxRows(),sourceSheet.getMaxColumns());
var sourcevalues = sourceRange.getValues();
SpreadsheetApp.getActiveSpreadsheet().toast("Working on it.. 60%", "Busy",12);
var destRange = destSheet.getRange(1, 1, destSheet.getMaxRows(), destSheet.getMaxColumns());
destRange.setValues(sourcevalues);
var theBlob = destSpreadsheet.getBlob().getAs('application/pdf').setName(subject);
var newFile = folder.createFile(theBlob);
//*****************************
SpreadsheetApp.getActiveSpreadsheet().toast("Working on it.. 75%", "Busy",12);
// Create a new Spreadsheet and copy the current sheet into it.
var newSpreadsheet = SpreadsheetApp.create("Spreadsheet to export");
var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
var projectname = SpreadsheetApp.getActiveSpreadsheet();
sheet = originalSpreadsheet.getActiveSheet();
sheet.copyTo(newSpreadsheet);
var pdf = DriveApp.getFileById(originalSpreadsheet.getId()).getAs('application/pdf').getBytes();
var attach = {fileName:'Klerkscale Certificate',content:pdf, mimeType:'application/pdf'};
MailApp.sendEmail(emailTo, subject, message, {attachments:[theBlob]});
DriveApp.getFileById(newSpreadsheet.getId()).setTrashed(true);
originalSpreadsheet.toast("Certificate will be sent shortly to " + emailTo,"Success",20);
}
This is the cropped received email result :

Answer 1

Ok I saw your problem, you're deleting all the sheets which are being referenced by the active sheet in destSpreadsheet thus they will not be available and the results will be #REF! for each cell referencing those deleted sheets. To solve that problem you could use the getDisplayValues() method, which retrieves the current displayed value of the cell instead of getValues() which retrieves the function(VLOOKUP in this case) set in the cell. Change this line:
var sourcevalues = sourceRange.getValues();
For this:
var sourcevalues = sourceRange.getDisplayValues();
Also, don't delete the other sheets which are being referenced until you have copyied the values to destRange in this line:
destRange.setValues(sourcevalues);