title: accessing other google spreadsheet from a remote onedit installable trigger
body: <p>I have a google script (bound to a sheet) where I put a code for manipulating some oher &quot;remote&quot; sheets.
  In this way I can avoid others editors of these sheets to access my code.
  All the actions I need to do in these remote sheets are fired by changing the value of a cell in the remote sheet (cell unprotected to the other editors) and with an installable on edit trigger from my account and from my script (in every remote sheet) I can read this value, detect the sheet and execute the action in the remote sheet.</p>
  <p>All of this is working fine, but I've found a trouble when I need to access some data in other external sheet.
  I've tried to open this external sheet using SpreadsheetApp.openById(Sheet_ID) but it fails saying there is no function/property</p>
  <p>Is there any solution for this or another way to do that?</p>
  <p>*** Act 19-06-21: it's working fine now. It was my fault using the ID of the sheet. Thanks for the help!</p>