AI Agent: Call n8n Workflow Tool - Invalid URL error

[AiSQUIRE]

I want to call a sub workflow, source database, selected from list.

alway throws error “invalid URL”

i can call the sub workflow via “Execute Workflow” node flawlessly.

{
“errorMessage”: “Invalid URL”,
“errorDetails”: {
“rawErrorMessage”: [
“Invalid URL”
],
“httpCode”: “none”
},
“n8nDetails”: {
“nodeName”: “My Open Tasks”,
“nodeType”: “@n8n/n8n-nodes-langchain.toolWorkflow”,
“nodeVersion”: 1.2,
“itemIndex”: 0,
“runIndex”: 0,
“time”: “14.11.2024, 01:50:39”,
“n8nVersion”: “1.67.1 (Cloud)”,
“binaryDataMode”: “filesystem”,
“stackTrace”: [
“NodeApiError: Invalid URL”,
" at RoutingNode.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/RoutingNode.js:183:23)“,
" at Workflow.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/Workflow.js:773:23)”,
" at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/WorkflowExecute.js:704:51",
" at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/WorkflowExecute.js:1134:20"
]
}
}

Is this a bug? Or am I missing something?

Thank you.

[n8n]

It looks like your topic is missing some important information. Could you provide the following if applicable.

• n8n version:
• Database (default: SQLite):
• n8n EXECUTIONS_PROCESS setting (default: own, main):
• Running n8n via (Docker, npm, n8n cloud, desktop app):
• Operating system:

[AiSQUIRE]

See

{
“errorMessage”: “Invalid URL”,
“errorDetails”: {
“rawErrorMessage”: [
“Invalid URL”
],
“httpCode”: “none”
},
“n8nDetails”: {
“nodeName”: “My Open Tasks”,
“nodeType”: “@n8n/n8n-nodes-langchain.toolWorkflow”,
“nodeVersion”: 1.2,
“itemIndex”: 0,
“runIndex”: 0,
“time”: “14.11.2024, 01:50:39”,
“n8nVersion”: “1.67.1 (Cloud)”,
“binaryDataMode”: “filesystem”,
“stackTrace”: [
“NodeApiError: Invalid URL”,
" at RoutingNode.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/RoutingNode.js:183:23)“,
" at Workflow.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/Workflow.js:773:23)”,
" at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/WorkflowExecute.js:704:51",
" at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/WorkflowExecute.js:1134:20"
]
}
}

[Jon]

Hey @AiSQUIRE,

That is very odd, Do you have a screenshot of the error? It doesn’t look the error is coming from the execute workflow node so could be an error coming back from the workflow you are calling.

[AiSQUIRE]

In order to rule out personal mistakes I did copy Suggest meeting slots using AI | n8n workflow template

Same error occured with the “Workflow Tool” node.

So I guess it’s a system error.

[Jon]

It looks like it, I will give it a test this morning and see if I can reproduce it.

[AiSQUIRE]

Hey Jon, did you get a chance to reproduce it?

[Wengier]

Did you ever find a solution. I’m having the same issue accesing a Basic LLM Chain.

[Jon]

Hey @AiSQUIRE,

Not yet, I have had a play with a simple workflow on 1.68 using the example below and it is working.

Can you test this workflow and try updating.