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Is my Agent tool usage correct?

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Last Post by Gallo_AIA 4 weeks ago

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albertocv

(@albertocv)

Posts: 3

Active Member

Topic starter

I'm integrating a WhatsApp tool with an AI agent. The agent is being called correctly, but I'm not receiving the message.

Upon reviewing the execution, I observe the following:

Does this indicate that the agent attempted to set the field named "Text_Body" when the actual field name is "Text Body" (without the underscore)?

Is there something I'm configuring incorrectly?

Could this be a bug?

Posted : 09/07/2025 2:29 pm

Gallo_AIA

(@gallo_aia)

Posts: 22

Eminent Member

Hello,

It doesn't seem to be an issue with your field naming or usage. I suspect it's a bug within the WhatsApp Business Cloud node that causes failures when dynamic parameters are used.

github.com/n8n-io/n8n

WhatsApp Business Cloud Node Fails with "No Execution Data Available" When Using Dynamic Parameters

opened 11:33PM - 12 Mar 25 UTC

closed 09:38AM - 13 Mar 25 UTC

AngelBReal

in linear

Duplicate

## Describe the problem/error/question

When using the WhatsApp Business Cloud callin.io node with dynamic values for the recipient phone number or text body, the workflow execution fails with the error "No execution data available."

The issue only occurs when using parameters in the recipient or text fields. If both values are hardcoded, the message sends successfully.

Things I’ve Tried (Still Getting the Error):
✅ Converted values to .toString() → Still fails.
✅ Added a "Set" node before the WhatsApp node → Same issue.
✅ Tried different combinations of fixed/dynamic values:

Fixed phone + dynamic text → ❌ Error
Dynamic phone + fixed text → ❌ Error
Fixed phone + fixed text → ✅ Works
✅ Copied and pasted the entire workflow into a new one → Same error.
The only way to get the message to send is if both the phone number and text body are hardcoded.

What is the error message (if any)?

{
"errorMessage": "No execution data available",
"errorDetails": {},
"n8nDetails": {
"itemIndex": 0,
"runIndex": 0,
"time": "12/3/2025, 4:15:23 p.m.",
"n8nVersion": "1.82.1 (Cloud)",
"binaryDataMode": "filesystem",
"stackTrace": [
"ExpressionError: No execution data available",
" at Object.get (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/WorkflowDataProxy.js:310:31)",
" at Object.get (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/WorkflowDataProxy.js:1030:104)",
" at Proxy.eval (eval at getFunction (/usr/local/lib/nodemodules/n8n/nodemodules/@n8n/tournament/dist/FunctionEvaluator.js:14:22), <anonymous>:6:46)",
" at FunctionEvaluator.evaluate (/usr/local/lib/nodemodules/n8n/nodemodules/@n8n/tournament/dist/FunctionEvaluator.js:20:19)",
" at Tournament.execute (/usr/local/lib/nodemodules/n8n/nodemodules/@n8n/tournament/dist/index.js:43:31)",
" at evaluateExpression (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/ExpressionEvaluatorProxy.js:123:16)",
" at Expression.renderExpression (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/Expression.js:238:70)",
" at Expression.resolveSimpleParameterValue (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/Expression.js:217:34)",
" at Expression.getParameterValue (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/Expression.js:300:25)",
" at RoutingNode.getParameterValue (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/routing-node.js:414:40)",
" at RoutingNode.runNode (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/routing-node.js:97:30)",
" at WorkflowExecute.runNode (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/workflow-execute.js:739:26)",
" at /usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/workflow-execute.js:919:51",
" at /usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/workflow-execute.js:1252:20"
]
}
}

Please share your workflow/screenshots/recording

workflow:
{
"nodes": [
{
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "bd3c7b33-e943-45b2-adb1-ca05dd488db1",
"leftValue": "={{ $json["Tipo de Pack"] }}",
"rightValue": "PACK DE LEYES CERRADO",
"operator": {
"type": "string",
"operation": "equals",
"name": "filter.operator.equals"
}
}
],
"combinator": "and"
}
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"leftValue": "={{ $json["Tipo de Pack"] }}",
"rightValue": "PACK DE LEYES JUSTICIA",
"operator": {
"type": "string",
"operation": "equals"
},
"id": "95ac9e72-2ace-401a-8067-8138ca558036"
}
],
"combinator": "and"
}
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "6373afa8-d87a-4b34-a016-dfda7b154a81",
"leftValue": "={{ $json["Tipo de Pack"] }}",
"rightValue": "PACK DE LEYES AGENTE DE HACIENDA",
"operator": {
"type": "string",
"operation": "equals",
"name": "filter.operator.equals"
}
}
],
"combinator": "and"
}
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "7fe15d68-4ad2-45b2-a8f4-97206c5e6e8a",
"leftValue": "={{ $json["Tipo de Pack"] }}",
"rightValue": "Pack Personalizado",
"operator": {
"type": "string",
"operation": "equals",
"name": "filter.operator.equals"
}
}
],
"combinator": "and"
}
}
]
},
"options": {}
},
"type": "n8n-nodes-base.switch",
"typeVersion": 3.2,
"position": [
-400,
180
],
"id": "effd5c02-4ad0-4eaf-ad40-076f3f56f32a",
"name": "Switch Tipo Pack"
},
{
"parameters": {
"operation": "send",
"phoneNumberId": "",
"recipientPhoneNumber": "={{ $json.Phone.toString() }}",
"textBody": "=Hola ",
"additionalFields": {}
},
"type": "n8n-nodes-base.whatsApp",
"typeVersion": 1,
"position": [
40,
500
],
"id": "a0c18ccd-cb54-445d-a780-2610a3f59a2d",
"name": "Pack PersO",
"webhookId": "55dcbc89-c55d-415b-85ea-1e248ca2e033",
"credentials": {
"whatsAppApi": {
"id": "",
"name": "WhatsApp account Adrian"
}
}
},
{
"parameters": {
"amount": 50
},
"type": "n8n-nodes-base.wait",
"typeVersion": 1.1,
"position": [
-180,
500
],
"id": "",
"name": "Wait10",
"webhookId": ""
}
],
"connections": {
"Switch Tipo Pack": {
"main": [
[],
[],
[],
[
{
"node": "Wait10",
"type": "main",
"index": 0
}
]
]
},
"Pack PersO": {
"main": [
[]
]
},
"Wait10": {
"main": [
[
{
"node": "Pack PersO",
"type": "main",
"index": 0
}
]
]
}
},
"pinData": {},
"meta": {
"templateCredsSetupCompleted": true,
"instanceId": "5c431444819003241f8de37955f4075c96c60cff83a23fb628cc3eb4a130cd44"
}
}

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.) ⚠️ WARNING ⚠️ If you have sensitive data in your workflow (like API keys), please remove it before sharing.

Share the output returned by the last node

{
"errorMessage": "No execution data available",
"errorDetails": {},
"n8nDetails": {
"itemIndex": 0,
"runIndex": 0,
"time": "12/3/2025, 4:30:40 p.m.",
"n8nVersion": "1.82.1 (Cloud)",
"binaryDataMode": "filesystem",
"stackTrace": [
"ExpressionError: No execution data available",
" at Object.get (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/WorkflowDataProxy.js:310:31)",
" at Object.get (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/WorkflowDataProxy.js:1030:104)",
" at Proxy.eval (eval at getFunction (/usr/local/lib/nodemodules/n8n/nodemodules/@n8n/tournament/dist/FunctionEvaluator.js:14:22), <anonymous>:6:46)",
" at FunctionEvaluator.evaluate (/usr/local/lib/nodemodules/n8n/nodemodules/@n8n/tournament/dist/FunctionEvaluator.js:20:19)",
" at Tournament.execute (/usr/local/lib/nodemodules/n8n/nodemodules/@n8n/tournament/dist/index.js:43:31)",
" at evaluateExpression (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/ExpressionEvaluatorProxy.js:123:16)",
" at Expression.renderExpression (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/Expression.js:238:70)",
" at Expression.resolveSimpleParameterValue (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/Expression.js:217:34)",
" at Expression.getParameterValue (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-workflow/dist/Expression.js:300:25)",
" at RoutingNode.getParameterValue (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/routing-node.js:414:40)",
" at RoutingNode.runNode (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/routing-node.js:97:30)",
" at WorkflowExecute.runNode (/usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/workflow-execute.js:739:26)",
" at /usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/workflow-execute.js:919:51",
" at /usr/local/lib/nodemodules/n8n/nodemodules/n8n-core/dist/execution-engine/workflow-execute.js:1252:20"
]
}
}

Debug info

core

n8nVersion: 1.82.1
platform: docker (cloud)
nodeJsVersion: 20.18.3
database: sqlite
executionMode: regular
concurrency: 20
license: community

storage

success: all
error: all
progress: false
manual: true
binaryMode: filesystem

pruning

enabled: true
maxAge: 720 hours
maxCount: 25000 executions

client

userAgent: mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/134.0.0.0 safari/537.36
isTouchDevice: false

Generated at: 2025-03-12T23:21:17.862Z}

It might be beneficial to continue using static values for both the phone number and text body if that's feasible.

If you found this message helpful and it addressed your questions, please consider marking it as a solution. This practice encourages users to provide timely responses and assists other community members.

Posted : 10/07/2025 8:37 am

albertocv

(@albertocv)

Posts: 3

Active Member

Topic starter

I did not receive any error messages, and the execution completed successfully.

The WhatsApp number simply did not receive the message.

Is the agent calling Text_Body configured correctly?

Posted : 10/07/2025 9:55 am

Gallo_AIA

(@gallo_aia)

Posts: 22

Eminent Member

Could you attempt to send a text message using an expression rather than dynamically populating it with AI?

This way, we can determine if there's a bug or not.

Posted : 10/07/2025 4:17 pm

albertocv

(@albertocv)

Posts: 3

Active Member

Topic starter

Are you referring to the $fromAI() function?

Should I structure it like this:
{{$fromAI(“phone”, “user phone number”) + $fromAI(“request”,“summary of the conversation”)}}?

Posted : 11/07/2025 8:37 am

Gallo_AIA

(@gallo_aia)

Posts: 22

Eminent Member

I'm unsure if the expression $ fromAI is accurate, as I don't have visibility into the complete workflow. However, if you're considering it as input data, please assess its potential functionality.

Posted : 11/07/2025 3:48 pm

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