Question about branching and converging back to one branch

Questions
,
1

Describe the problem/error/question

I have a complex workflow, many nodes branch out to multiple branches to then converge back again. I am now facing a very irritating qwirk or issue:
For Google Drive & Binary Data Downloads I cannot have two nodes (where only one will execute) converge into one node that let’s say uploads a document to google drive irrespective if it comes from one node or the other. The test execution does not fail but returns an empty response and I cannot get any console logs or anything out of it.

What is the error message (if any)?

NONE!!!

Please share your workflow

Share the output returned by the last node

N/A

core

  • n8nVersion: 1.59.4
  • platform: docker (self-hosted)
  • nodeJsVersion: 20.17.0
  • database: sqlite
  • executionMode: regular
  • concurrency: -1
  • license: community
  • consumerId: unknown

storage

  • success: all
  • error: all
  • progress: false
  • manual: true
  • binaryMode: memory

pruning

  • enabled: true
  • maxAge: 336 hours
  • maxCount: 10000 executions

security

  • secureCookie: false

Generated at: 2024-09-25T12:20:24.927Z

2

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:
3

Can you try with Merge Node?
I use for Merge 2 output to one but setup to non-matches
It help to fix issue about Duplicate data too.

1 Like
4

How should this work? In my example I will only ever have one of the two google drive nodes return data as the other does not execute…

5

Am not sure this you went or not?
it should run all both if don’t have data it’ll send [undefined]

image
image1863×331 36.8 KB

6

The wierd issue is that the new node (the one that converges) does not output anything, no error, nothing:

Full example:

This is what happens:
Screenshot 2024-09-25 at 15.50.18

Let me know if you had this happen to you too.

7

ok i see.
the file upload in google drive or not when you running?

try with Always Output Data first.
image

and try node set for custom data if it not show

8

Hey @Gotppsn thanks! I already tried this but the issue is that one of the two google drive nodes WILL NOT execute simply because it’s not needed. So even if I specify to always return data it won’t since it will not be executed…

I am running out of ideas and the fact that the console and the app does not throw errors is also a mystery…

9

hello @karlfrankeser

So what is the issue? According to the workflow, you don’t need to run both Google Drive nodes.

But for Post Task Comment node you should change that part:

{{ $('Webhook').item.json.body.task_id }}

to

{{ $('Webhook').last().json.body.task_id }}
10

Hi there @barn4k,
thanks for your input, there is still something that’s not right, the node get’s executed but it does not return anything in the result tab, I also see no logs, errors, nothing…

Screenshot 2024-10-01 at 08.50.13

11

Clear the execution data (the button withe the bin)
image

and start it again. It sometimes may not work properly