# Tools not working after migration

**URL:** <https://community.n8n.io/t/tools-not-working-after-migration/249963>\
**Category:** Questions\
**Tags:** node\
**Created:** [January 14, 2026, 5:27pm UTC](https://community.n8n.io/t/tools-not-working-after-migration/249963 "2026-01-14T17:27:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![IgorGorunov](https://avatars.discourse-cdn.com/v4/letter/i/e79b87/32.png) [@IgorGorunov](https://community.n8n.io/u/IgorGorunov)\
**Post date:** [January 14, 2026, 5:27pm UTC](https://community.n8n.io/t/tools-not-working-after-migration/249963/1 "2026-01-14T17:27:28Z")

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Hi everyone!  
I recently updated to `n8n 2.3.4` using the official Docker image, and now none of the AI Agent tools are working.  
When I try to use any tool (like PostgresTool, HTTP Tool, CalculatorTool, etc), I get this error: Unrecognized node type: n8n-nodes-base.postgresTool  
The tools show up in the UI when I add them to an Agent, but when the Agent tries to run them, the workflow fails.  
I didn’t change anything in the n8n settings or customize any nodes. Everything worked before the update.  
Is this a known issue in version 2.3.4?  
Do I need to install or enable something else to make tool nodes work?  
Thank you in advance!

Here’s the workflow, if I delete the tool from it, everything works, it works the same way if I don’t access $node[“Data1”].json the previous node in the Data3 node

{  
“nodes”: [  
{  
“parameters”: {},  
“type”: “n8n-nodes-base.manualTrigger”,  
“typeVersion”: 1,  
“position”: [  
-1152,  
-96  
],  
“id”: “e50c770b-b027-4e93-95f9-7fcf56db29b9”,  
“name”: “When clicking ‘Execute workflow’”  
},  
{  
“parameters”: {  
“jsCode”: “return [\n {\n json:{\n product:“test product”,\n sku:“test sku”\n }\n }\n]”  
},  
“type”: “n8n-nodes-base.code”,  
“typeVersion”: 2,  
“position”: [  
-976,  
-96  
],  
“id”: “04668ad2-fa91-46c4-b192-d918cc7848b3”,  
“name”: “Data1”  
},  
{  
“parameters”: {  
“jsCode”: “return [\n {\n json:{\n product:“test product”,\n sku:“test sku”\n }\n }\n]”  
},  
“type”: “n8n-nodes-base.code”,  
“typeVersion”: 2,  
“position”: [  
-784,  
-96  
],  
“id”: “0d906cae-eda0-468c-ab09-6e7a761e3a20”,  
“name”: “Data2”  
},  
{  
“parameters”: {  
“options”: {}  
},  
“type”: “@n8n/n8n-nodes-langchain.agent”,  
“typeVersion”: 3.1,  
“position”: [  
-192,  
-80  
],  
“id”: “61e989b0-56be-4415-b681-fcfc696c6e12”,  
“name”: “AI Agent”  
},  
{  
“parameters”: {  
“jsCode”: “return [\n {\n json: $node[“Data1”].json\n }\n]”  
},  
“type”: “n8n-nodes-base.code”,  
“typeVersion”: 2,  
“position”: [  
-576,  
-96  
],  
“id”: “9d4bd4d2-af70-433a-8cc9-c343b8b32e48”,  
“name”: “Data3”  
},  
{  
“parameters”: {  
“options”: {}  
},  
“type”: “n8n-nodes-base.httpRequestTool”,  
“typeVersion”: 4.3,  
“position”: [  
-48,  
128  
],  
“id”: “0cb189ce-0085-4dc5-bcd7-4ebc3ba556a3”,  
“name”: “HTTP Request”  
}  
],  
“connections”: {  
“When clicking ‘Execute workflow’”: {  
“main”: [  
[  
{  
“node”: “Data1”,  
“type”: “main”,  
“index”: 0  
}  
]  
]  
},  
“Data1”: {  
“main”: [  
[  
{  
“node”: “Data2”,  
“type”: “main”,  
“index”: 0  
}  
]  
]  
},  
“Data2”: {  
“main”: [  
[  
{  
“node”: “Data3”,  
“type”: “main”,  
“index”: 0  
}  
]  
]  
},  
“HTTP Request”: {  
“ai\_tool”: [  
[  
{  
“node”: “AI Agent”,  
“type”: “ai\_tool”,  
“index”: 0  
}  
]  
]  
}  
},  
“pinData”: {},  
“meta”: {  
“templateCredsSetupCompleted”: true,  
“instanceId”: “727537f91e10d68b01bd855c72e6124591f3cde3ca211624cfe40bf4d03f9223”  
}  
}

---

<div class="post-metadata">

**Author:** ![achamm](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/achamm/32/143734_2.png) [@achamm](https://community.n8n.io/u/achamm)\
**Post date:** [January 15, 2026, 12:06am UTC](https://community.n8n.io/t/tools-not-working-after-migration/249963/2 "2026-01-15T00:06:24Z")

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If you click on the node and go to node settings, what does it say for the node version? Does it say Node version (version) latest - (latest version) or just say the current version? Can you take a screenshot?

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<div class="post-metadata">

**Author:** ![IgorGorunov](https://avatars.discourse-cdn.com/v4/letter/i/e79b87/32.png) [@IgorGorunov](https://community.n8n.io/u/IgorGorunov)\
**Post date:** [January 19, 2026, 8:05pm UTC](https://community.n8n.io/t/tools-not-working-after-migration/249963/3 "2026-01-19T20:05:29Z")

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The problem is solved, if someone has such a problem, then in the new version such code works badly $node[“Data1”].json, it’s better to use $(‘Data1’).first().json

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/n8n/user_avatar/community.n8n.io/system/32/195824_2.png) [@system](https://community.n8n.io/u/system)\
**Post date:** [April 19, 2026, 8:06pm UTC](https://community.n8n.io/t/tools-not-working-after-migration/249963/4 "2026-04-19T20:06:16Z")

</div>

Closed on April 19, 2026, 8:06pm UTC

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