Node-RED: How to catch and log errors from Node-RED nodes

This documentation is part of the Getting started guide. View the full guide here: How to get started with Node-RED.

Welcome to the Stackhero documentation

Stackhero provides a fully managed Node-RED cloud environment designed to get you building workflows quickly:

• Built-in MQTT server (Mosquitto) for seamless IoT integration.
• Full access to the Node-RED admin UI for managing flows and settings.
• Node-RED Dashboard included for real-time visualization.
• Dedicated SMTP email server included, with no limits on sending.
• Effortless one-click updates to keep your instance current.
• Custom domain names with automatic HTTPS: for example, https://node-red.your-company.com.
• High performance and strong security with private, dedicated infrastructure.

You can have a secure, production-ready Node-RED cloud hosting instance running in about 5 minutes. Stackhero handles setup, updates, and infrastructure so you can focus on building automations.

At times, nodes may generate errors. A practical solution is to set up a "catch all debug" flow to monitor these errors.

Example of a Node-RED error catch flow

To set this up, add a catch node and connect it to a debug node. Configure the debug node to output the complete msg object. This setup logs each error generated in the flow to the Node-RED debug window.

Example of a Node-RED node error caught

A catch node is only triggered by errors from nodes within the same flow. If you use multiple flows (or tabs), you will need to add the catch and debug nodes to each flow.