https://www.pbainbridge.co.uk/2022/11/filter-trycatch-error-message.html

Filter a try_catch error message.gs

/*
Testing the ability to search a 'Catch' error message and display a specific
one based upon it.
*/


function breakMe() {

  try {

    // get this Google Drive File
    var file = DriveApp.getFilById('ENTER FILE ID HERE');

    // log message
    Logger.log('Function worked');

  }
  catch (error) {

    // log message
    Logger.log('Function failed');

    // log message
    Logger.log("Catch error is: " + error);


    // convert 'catch' message to string and perform JavaScript 'match' for keywords
    var errorString = error.toString();
    var matching = errorString.match(/is not a function/gi);
    Logger.log(matching);

    // test if 'match' is true to display specific log message
    if (matching) {
      // log message
      Logger.log('True');
    }
    else {
      // log message
      Logger.log('False');
    }

  }


}