N8n Reddit createComment node only processes first item (‘things’ undefined’)

Questions
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1

I have an n8n workflow that:

  1. Scrapes Reddit posts
  2. Filters out posts older than 12 hours or not marked “Relevant”
  3. Drafts a comment with OpenAI
  4. Appends each item to Google Sheets
  5. Retrieves the row and posts the comment back to Reddit

When I supply a list of, say, 10 posts/URLs, the workflow only ever posts one comment and then stops. I’m trying to loop over all items, but I get an error about an undefined variable called things in the Create a comment in a post node.

Beyond that, I also want to:

  • Filter out locked Reddit posts (i.e. don’t attempt to comment on posts where comments are locked)
  • Automatically remove duplicates from my Google Sheet so I never post the same link twice
  • Only post new items on each run (i.e. rows added in the last execution, not older rows)
  • Keep the workflow running automatically, without manually triggering it, so it continually picks up new posts

Describe the problem/error/question

When I supply a list of, say, 10 posts/URLs, the workflow only ever posts one comment and then stops. I’m trying to loop over all items, but I get an error about an undefined variable called things in the Create a comment in a post (Reddit) node.

What is the error message (if any)?

Cannot read properties of undefined (reading 'things')

This error occurs in the Create a comment in a post node. If I enable Continue on Fail, the workflow runs without crashing but still only processes the first item

Please share your workflow

2

Add an If node before Create a comment in a post that checks that the ID field exists and that the post isn’t locked. If Reddit returns a locked: true field in the post’s JSON, use it.

Enable Continue on Fail. Although you’ve already set this up for some nodes, I recommend making sure it’s enabled specifically for Create a comment in a post. This prevents a single item error from interrupting the entire batch.

3

Hi Erick,

Thank you for your response. I don’t actually have a locked flag or any json.locked variable, it’s coming back as undefined. And even with Continue on Fail enabled on the Create Comment node, it still aborts.