Manual, partial, and production executions

There are some important differences in how n8n executes workflows manually (by clicking the Execute Workflow button) and automatically (when the workflow is Active and triggered by an event or schedule).

Manual executions

Manual executions allow you to run workflows directly from the canvas to test your workflow logic. These executions are "ad-hoc": they run only when you manually select the Execute workflow button.

Manual executions make building workflows easier by allowing you to iteratively test as you go, following the flow logic and seeing data transformations. You can test conditional branching, data formatting changes, and loop behavior by providing different input items and modifying node options.

Partial executions

Clicking the Execute workflow button at the bottom of the workflow in the Editor tab manually runs the entire workflow. You can also perform partial executions to run specific steps in your workflow. Partial executions are manual executions that only run a subset of your workflow nodes.

To perform a partial execution, select a node, open its detail view, and select Execute step. This executes the specific node and any preceding nodes required to fill in its input data. You can also temporarily disable specific nodes in the workflow chain to avoid interacting with those services while building.

In particular, partial executions are useful when updating the logic of a specific node since they allow you to re-execute the node with the same input data.

Troubleshooting partial executions

Some common issues you might come across when running partial executions include the following:

This error message appears when you try to perform a partial execution without connecting the workflow to a trigger. Manual executions, including partial executions, attempt to mimic production executions when possible. Part of this includes requiring a trigger node to describe when the workflow logic should execute.

To work around this, connect a trigger node to the workflow with the node you're trying to execute. Most often, a manual trigger is the simplest option.

This error can appear when performing partial executions on workflows with large numbers of branches. Partial executions involve sending data and workflow logic to the n8n backend in a way that isn't required for full executions. This error occurs when your workflow exceeds the maximum size allowed for these messages.

To work around this, consider using the limit node to limit node output while running partial executions. Once the workflow is running as intended, you can disable or delete the limit node before enabling production execution.

Production executions

Production executions occur when a triggering event or schedule automatically runs a workflow.

To configure production executions, you must attach a trigger node (any trigger other than the manual trigger works) and switch workflow's toggle to Active. Once published, the workflow automatically executes whenever the trigger condition occurs.

The execution flow for production executions doesn't display in the Editor tab of the workflow as with manual executions. Instead, you can see executions in the workflow's Executions tab according to your workflow settings. From there, you can explore and troubleshoot problems using the debug in editor feature.