Unhandled IF branch in n8n
- Feb 13
- 1 min read
What this means (non-technical)
An IF node has two outputs: true and false. If only one branch is connected and the other is left unconnected, items sent to the unconnected branch are silently dropped.
There is no automatic warning.
What usually goes wrong
If your condition does not match all items:
Some items disappear.
Processing becomes incomplete.
Results appear inconsistent.
Because there is no error, it may take time before anyone notices missing data.
This often happens when a condition assumes all data will pass, but real-world data behaves differently.
When this becomes urgent
This becomes urgent when:
Data accuracy is important.
Conditions rely on user input.
Input formats evolve over time.
You notice mismatched totals in reports.
The more complex the condition, the easier it is to miss edge cases.
Detect issues in your n8n workflows
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Definitions
IF node: An n8n node that splits items into true or false branches based on a condition.
Branch: A separate path in a workflow that items follow after a decision point.
Disclaimer
This article highlights common patterns and risks seen in real-world n8n workflows. It’s meant to help you build more confidently and avoid surprises as your automation grows. Behavior can vary depending on your setup, version, and configuration.