Issue after updating to 1.56.2

Questions
1

Describe the problem/error/question

I have one workspace that can’t be activated.

It was fine on 1.50.X before i update to 1.56.2 today

What is the error message (if any)?

Workflow could not be activated:

There was a problem activating the workflow: “Unknown alias: nul”

Please share your workflow

(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.)

Share the output returned by the last node

Information on your n8n setup

  • n8n version: 1.56.2
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): n8n cloud
  • Operating system:
2

Hi @Lucas_Ruelle

Are you able to run the workflow in test mode without errors?

This could likely to be due to a mismatch in versioning. The Postgress node has been slightly updated in v.1.56.0 - Release [email protected] · n8n-io/n8n · GitHub - Could you replace the Portgress nodes for their latest version and let us know the outcome?

You can do this simply by removing the current nodes and adding setting them up again.

1 Like
3

Hi,

Yes i can run in test mode without errors

I just changed the 2 postgres and now the error did changed

Workflow could not be activated:
There was a problem activating the workflow: "Unknown alias: obj"```

i guess maybe another item have some issue too
4

I am having the same issues. Had a workflow active and running, but stopped. It tests fine, completes, etc. I deactivated each node at a time to test, but nothing has worked. I can not activate it and it gets the same error you are getting.

EDIT: Of course, as soon as I post this I try something that worked - I deleted the trigger node and re-entered it. Now it can be activated.

2 Likes
5

Thanks. I checked and the schedule trigger node was in weird state so i did change the dropdown back to hour and anything is fine now also.

1 Like
6

Glad to hear it @Lucas_Ruelle !

1 Like