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Add common issues to if node #2586

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Add common issues to if node #2586

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27 changes: 27 additions & 0 deletions docs/integrations/builtin/core-nodes/n8n-nodes-base.if/common-issues.md
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---
#https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4
title: If node common issues
description: Documentation for common issues and questions in the If node in n8n, a workflow automation platform. Includes details of the issue and suggested solutions.
contentType: integration
priority: high
---

# If node common issues

Here are some common errors and issues with the [If node](/integrations/builtin/core-nodes/n8n-nodes-base.if/) and steps to resolve or troubleshoot them.

## Can't get data for expression

This error occurs when the If node can't retrieve the data referenced by an expression. This happens when n8n tries to find an item through [item linking](/data/data-mapping/data-item-linking/) but runs into problems.

For example, this JSON references the parameters of the input data. This error will display if you test this step without connecting it to another node:

```javascript
{
"my_field_1": {{ $input.params }}
}
```

To troubleshoot this problem, see the [item linking errors](/data/data-mapping/data-item-linking/item-linking-errors/) page to understand how to reference data from nodes that don't include pairing information.

--8<-- "_snippets/integrations/referenced-node-unexecuted.md"
7 changes: 5 additions & 2 deletions ...s/builtin/core-nodes/n8n-nodes-base.if.md → ...tin/core-nodes/n8n-nodes-base.if/index.md
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---
#https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4
title: If
title: If node
description: Documentation for the If node in n8n, a workflow automation platform. Includes guidance on usage, and links to examples.
priority: critical
tags:
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- tags
---

# If
# If node

Use the If node to split a workflow conditionally based on comparison operations.

Expand Down Expand Up @@ -49,3 +49,6 @@ If you need more than two conditional outputs, use the [Switch node](/integratio

--8<-- "_snippets/integrations/builtin/core-nodes/data-types.md"

## Common issues

For common questions or issues and suggested solutions, refer to [Common Issues](/integrations/builtin/core-nodes/n8n-nodes-base.if/common-issues/).
4 changes: 3 additions & 1 deletion mkdocs.yml
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Expand Up @@ -379,7 +379,9 @@ nav:
- HTTP Request:
- HTTP Request: integrations/builtin/core-nodes/n8n-nodes-base.httprequest/index.md
- Common issues: integrations/builtin/core-nodes/n8n-nodes-base.httprequest/common-issues.md
- integrations/builtin/core-nodes/n8n-nodes-base.if.md
- If:
- If: integrations/builtin/core-nodes/n8n-nodes-base.if/index.md
- Common issues: integrations/builtin/core-nodes/n8n-nodes-base.if/common-issues.md
- integrations/builtin/core-nodes/n8n-nodes-base.jwt.md
- integrations/builtin/core-nodes/n8n-nodes-base.ldap.md
- integrations/builtin/core-nodes/n8n-nodes-base.limit.md
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