Run menu shows “No functions” when gmail.gs is open, and its functions don’t seem to execute

[Márton Jakab]

Hi all — I’m seeing a weird editor/runtime mismatch isolated to gmail.gs.

What I see

• If the editor tab is gmail.gs, the Run button is grey and the function dropdown says “No functions”.

• If I switch to any other file (e.g., main.gs), the Run button becomes active and other functions run fine.

• However, functions inside gmail.gs (e.g., previewGmail_) never appear in the dropdown, and when I call them indirectly from main.gs, I don’t get any output (no email/logs) and no explicit error — the execution log just says “started/finished.”

Environment

• New Apps Script editor, V8 runtime.

• Consumer Gmail account.

• Other parts work: Drive folder creation, Sheets writes, success email — all OK.

• appsscript.json has these scopes:

  • .../auth/drive

  • .../auth/spreadsheets

  • .../auth/gmail.readonly

  • .../auth/gmail.modify

  • .../auth/script.send_mail

What I tried

• Save all files, hard refresh, switch back to Editor view from Execution log.

• Created a brand-new script project and pasted only gmail.gs below → same result.

• If I comment out the entire gmail.gs, the Run menu works normally for the rest of the project.

Question
Is there a known issue that would make the editor fail to recognize top-level functions in a specific .gs file (and disable Run while that tab is focused)? Any parser quirks I might be hitting with the code below?

Minimal gmail.gs (standalone):

/** Return INBOX messages since cutoff that match subject or special sender. */
function gmailFindCandidates_() {
  var cutoff = getCutoff_();
  var afterDay = Utilities.formatDate(cutoff, SETTINGS.TIMEZONE, "yyyy/MM/dd"); // Gmail after: is day-based

  var q1 = 'in:inbox subject:"Teszt - Megrendelés (" after:' + afterDay;
  var q2 = 'in:inbox from:szal...@teszt.hu after:' + afterDay;

  var threads = GmailApp.search(q1).concat(GmailApp.search(q2));
  var seen = {};
  var msgs = [];

  for (var t = 0; t < threads.length; t++) {
    var list = threads[t].getMessages();
    for (var i = 0; i < list.length; i++) {
      var m = list[i];
      var id = m.getId();
      if (seen[id]) continue; // dedupe across queries
      seen[id] = true;
      if (m.getDate().getTime() > cutoff.getTime()) {
        msgs.push(m);
      }
    }
  }

  // Oldest → newest
  msgs.sort(function (a, b) { return a.getDate().getTime() - b.getDate().getTime(); });
  return msgs;
}

/** Preview: logs candidate emails (date, from, subject, ids). */
function previewGmail_() {
  var cutoff = getCutoff_();
  var msgs = gmailFindCandidates_();
  Logger.log("Cutoff: %s | Candidates: %s", fmtTZ(cutoff, "yyyy.MM.dd HH:mm"), msgs.length);
  for (var i = 0; i < msgs.length; i++) {
    var m = msgs[i];
    Logger.log(
      "%s) %s | from=%s | subj=%s | msgId=%s | threadId=%s",
      (i + 1),
      fmtTZ(m.getDate(), "yyyy.MM.dd HH:mm"),
      m.getFrom(),
      m.getSubject(),
      m.getId(),
      m.getThread().getId()
    );
  }
}

(In my project, helper functions getCutoff_() and fmtTZ() live in another file; in a fresh repro I stubbed them, but the editor still greys out the Run menu whenever gmail.gs is the active tab.)

Any ideas or known editor bugs I should be aware of? Thanks!

[Valentin Stepaniuk]

Why an underscore in the end

To: Google Apps Script Community <google-apps-sc...@googlegroups.com>;
Subject: [Apps-Script] Run menu shows “No functions” when gmail.gs is open, and its functions don’t seem to execute;
23.09.2025, 09:55, "Márton Jakab" <vitami...@gmail.com>:

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[Andrew Roberts]

The underscore hides the functions as it makes them private.

To view this discussion visit https://groups.google.com/d/msgid/google-apps-script-community/1680591758611717%40zh4mfevp4ifcvtxn.vla.yp-c.yandex.net.

[Keith Andersen]

Andrew,

I know leading function names with and underscore causes them to be invisible... but does a trailing underscore also cause it to be invisible?

My website: https://sites.google.com/view/klaweb/
Passions: God, Family, Scriptures, Learning, Data Management, Google Sheets + App Script and much more!

To view this discussion visit https://groups.google.com/d/msgid/google-apps-script-community/CAN1QPJSkza8Z8BMSbcJcOj5rs-bp8jusP%2BqApaOZieiKZmjrUQ%40mail.gmail.com.

[Márton Jakab]

All sorted! Thank you so much for your response!