# NousResearch/hermes-agent · Cron external worker ModuleNotFoundError ruamel fix

## Open now

- Nothing open on GitHub.

A bug where restart-safe cron external workers and scripts were dying with a \`ModuleNotFoundError\` for \`ruamel\`, traced to running under the wrong interpreter environment. A fix ensures cron jobs use the committed environment interpreter, and jobs now close on a broken PM boot rather than hanging.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #126344. Verify it addresses your case.
- **Recommended:** read PR #126344 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `resolved` · deciding PR(s): `pr-126344`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Closed / duplicate issues

- #123400: \[BUG\] PM runtime: restart-safe cron external worker dies with ModuleNotFoundError: ruamel

## Prior & competing PRs

- **#126344: Restart-safe cron jobs no longer die on 'No module named ruamel' under multiplex, and fail closed on a broken PM boot (#122222, salvage #122936)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/123456hyu@users.noreply.github.com`, `contributors/emails/146008217+aglowinthefield@users.noreply.github.com`, `contributors/emails/4469382+etrisnanto@users.noreply.github.com`, `contributors/emails/[redacted:email]`, `contributors/emails/[redacted:email]`, `cron/AGENTS.md`, `cron/__init__.py`, `cron/scheduler.py`, `cron/scheduler_worker_env.py`, `cron/worker_bootstrap.py`, `tests/cron/test_restart_safe_worker.py`
- **#123525: fix(cron): run external workers and scripts on the committed environment interpreter (fixes #123400, #123440)**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`

## Fix status

- Merged to main in PR #126344 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-28`.
- Subsystem: `cron`