Octopus "Deployment failed" in CI

octo waited on a deployment task that finished in a Failed state. The CLI exit code reflects the server task, and the real cause is a specific step or child step inside the deployment that returned a fatal error, visible in the task log.

What this error means

octo deploy-release or create-release --deployTo exits non-zero with "Deployment X: Web release 1.0.0 to Production failed" after streaming the task log.

Deploying Web release 1.0.0 to Production...
The deployment failed. Please see the deployment log for details.
Octopus.Client.Exceptions.OctopusDeploymentException: Deployment failed.

Common causes

A deployment step returned a fatal error

A script, package deploy, or health-check step inside the process failed, which fails the whole deployment task.

A target or dependency problem surfaced at deploy time

An offline target, a missing variable, or a failed health check inside the process caused the task to end in Failed.

How to fix it

Open the task log and find the failing step

1. Follow the deployment task URL octo prints, or stream the log with --progress.
2. Locate the first step marked Failed and read its error.
3. Fix that step (script error, target, or variable) and re-deploy.

octo deploy-release --project "Web" --version 1.0.0 \
  --deployTo Production --progress \
  --server "$OCTOPUS_URL" --apiKey "$OCTOPUS_API_KEY"

Reproduce the failing step in isolation

Run just the failing script or package step against the same target to reproduce and fix the underlying cause before re-running the full deploy.

How to prevent it

• Stream the task log in CI so the failing step is visible in the run.
• Guard steps that depend on external systems with health checks.
• Keep deployment scripts idempotent so re-runs are safe.

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