> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/integrations/builtin/core-nodes/duaer-nodes-base.scheduletrigger/common-issues.md).

# Common issues with Schedule Trigger in Duaer

Common Schedule Trigger issues in Duaer: invalid cron expressions, runs at the wrong time, and interval changes that do not apply.
## Invalid cron expression <a href="#invalid-cron-expression" id="invalid-cron-expression"></a>

With Trigger Interval set to Custom (Cron), Duaer could not read your expression. Check that:

- It follows the examples on the node. A first seconds column makes six fields; without seconds there are five.
- With the seconds column removed, it validates on crontab.guru.

## Runs at the wrong time <a href="#scheduled-workflows-run-at-the-wrong-time" id="scheduled-workflows-run-at-the-wrong-time"></a>

Usually the time zone. Change it for the instance or for one digital organization:

- Self-hosted Duaer: set the instance time zone with GENERIC_TIMEZONE.
- One digital organization: open settings from the menu at the top right of the canvas, change Timezone, and save.

## A new interval or variable does not apply <a href="#changing-the-trigger-interval" id="changing-the-trigger-interval"></a>

Schedule Trigger reads its interval, and any variables in it, when you publish. After publishing, unpublish and publish again for a change to apply.

The schedule counts from the moment you publish. For example, hourly with a run due at 12:00, changed to every 2 hours and republished at 11:30, next runs at 13:30.
## Questions

### Why does the Duaer Schedule Trigger run hours off?

Usually the Duaer time zone. Change Timezone in the digital organization settings, or have a self-hosted admin set GENERIC_TIMEZONE.

### Do I need to republish after changing a Duaer Schedule Trigger interval?

Yes. Duaer reads the interval on publish, so unpublish and publish again for the new interval to apply.