Issue with gmail sender


Getting this error message at the Gmail sender stage of my flow:

Gmail Sender Failed!
Node ‘Gmail Sender’ running in List Mode has an input ‘Clean Email’ which is a list of 2 items. This is not matching the size of another one of the inputs, which has 1 items.

Please make sure all lists that go into this node are the same size.

The Google Sheet doesn’t have 2 items in that column. it just has one!
Please help

Gumloop link = https://www.gumloop.com/pipeline?workbook_id=tBDPTveknqQ2YhqQtHLGUJ&run_id=YpteYLtC9snXkHRHEKVYSF

Hey @kimtang! If you’re reporting an issue with a flow or an error in a run, please include the run link and make sure it’s shareable so we can take a look.

  1. Find your run link on the history page. Format: https://www.gumloop.com/pipeline?run_id={{your_run_id}}&workbook_id={{workbook_id}}

  2. Make it shareable by clicking “Share” → ‘Anyone with the link can view’ in the top-left corner of the flow screen.
    GIF guide

  3. Provide details about the issue—more context helps us troubleshoot faster.

You can find your run history here: https://www.gumloop.com/history

Hey @kimtang – It seems like you’re passing data from two different sources that don’t match is size (ie. there isn’t a 1:1 correspondence) so the node can’t pair them up in loop mode.

I’d recommend going through this doc to understand the issue: List Size Mismatch Errors - Gumloop

The solution would be to use a subflow like outlined in the doc. The subflow would work for a single input (ie a single email) and you can then loop the entire subflow over your Google Sheet.

Let me know if you still run into issues.

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