Help Needed: PDF Webhook to Gmail Attachment Error

Questions
,
1

My Workflow

I’ve created a workflow with the following nodes:

  1. Webhook (receiving a PDF file)
  2. Extract from File node (PDF)
  3. AI Agent
  4. Gmail (to send the PDF as an attachment)

The Problem

When I try to run this workflow, I get the following error at the Gmail node:

Cannot read properties of undefined (reading '0') (item 0)

What I’ve Tried

  • I can see the PDF file in binary data from the webhook
  • I’ve set the binary name in the Gmail attachment field
  • The Extract from File node seems to be working correctly

Details

  • The PDF is successfully received by the webhook
  • The Extract from File node processes the PDF
  • When the data reaches the Gmail node, it fails with the error

My Questions

  1. Why am I getting this error if the binary data is visible from the webhook?
  2. How should I properly configure the Gmail node to use the PDF as an attachment?

Any help would be greatly appreciated! Thank you.

Using n8n self hosting.

2

Please share your workflow. Select all relevant elements on canvas, Ctrl/Cmd-C, then paste it in your post using </> button.

3

Okay, this is my workflow, please help:

4

Hi sir, could you help me to solve my question? About sending an attachment using Gmail

5

Hi @ashafizullah , my apologies, missed this one.
I can be wrong but I do not think AI agent is able to bypass binary files to its tools.
There is also no way to refer to an earlier node as Gmail node expects a field name as a literal.
I’d suggest using the Structured Output Parser tool to get data from the AI Agent and wire Merge and Gmail nodes after an AI node where you’d be able to attach a binary.
Below is a wireframe of what you’d be looking for. I didn’t tune any nodes for your use case. It is just to give an idea of what a workaround would be.

Hope this helps.

6

Thank you so much. Its working!