---
title: "Troubleshooting"
slug: "dev-dataengine-troubleshooting"
tags: ["DataEngine"]
updated: 2026-10-28T02:15:22Z
published: 2026-10-28T02:15:22Z
canonical: "docs.vastdata.com/dev-dataengine-troubleshooting"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Troubleshooting

Where to look when a pipeline misbehaves. Start with Troubleshooting VAST DataEngine for symptoms without a message, and search the DataEngine error reference when a command prints an error.

- **[Troubleshooting VAST DataEngine](/develop/docs/dev-dataengine-troubleshooting-index)**: Diagnose pipelines stuck in InProgress, events that don't arrive, handler failures and changes that don't take effect, by symptom.
- **[DataEngine error reference](/develop/docs/dev-dataengine-troubleshooting-errors)**: Error messages from vastde, the cluster and the runtime while you build, register and deploy, with the cause and fix of each.