TypeError: Cannot read property “source” from undefined

Question

I\'ve searched through the forums a few times and I wasn\'t able to suss out an answer to my issue.

I\'m using Google Sheets to track project progress for my team.

Answer 1

I think this will work for you,

var ss = SpreadsheetApp.getActiveSheet();
var s = ss.getActiveSheet();
var r = s.getActiveRange();

Let me know if it is working OR not.

Answer 2

I encountered some similar exception in my app script but in my case, there was a silly mistake, I forgot passing variable reference while calling the method

function validate(name) {
  if (!codeConstants[name]) {
    Logger.log('Error:' + name);
  }
}

function init(name) {
  if (!validate())
    return;

  // some code....
}

My validate method call had a trouble it should be changed to

if (!validate(name))

Answer 3

Looks that you are running the function from the Script Editor. In this case, event is undefined. To learn about how to test a trigger function see How can I test a trigger function in GAS?