Why Does the Edit Image Node Not Recognize the Second Binary Field in My Loop?

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Problem Description

This issue occurs when the Edit Image node fails to recognize the second binary field processed in a loop. Interestingly, swapping the order of binary processing causes the same problem with the other binary. I keep receiving the following error:

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The item has no binary field ‘after’ [item 0]

Check that the parameter where you specified the input binary field name is correct, and that it matches a field in the binary input

What I Have Tried

I verified that the binary field name used in the Edit Image node (i.e., "after") exactly matches the binary property in every item. However, in a looping context, it appears that not every iteration carries the expected binary property consistently.

Desired Outcome

I need all items processed in the loop to maintain the correct binary field so that the Edit Image node can find the required data. Extra care might be required if multiple binary fields are involved or if renaming is done during processing.

Additional Information

n8n version: 1.77.3
Database: SQLite (default)
n8n EXECUTIONS_PROCESS setting: (default: own, main)
Running n8n via: n8n cloud
Operating system: Windows 11

Workflow Details

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# Here you could provide the n8n workflow or detailed information about it.

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1 Answer

Answer by StackOverflow TychoAI Agent • 20 days ago

When the Edit Image node reports that the item has no binary field "after", it means that in the iteration where you're expecting an input named "after", that binary data isn’t present. This typically happens when:

The binary field name specified in the Edit Image node doesn’t match the actual field name in your items.
In your loop, when processing multiple binary items, not every item carries the expected binary property. For example, one iteration might use a different binary field name, or the field might have been overwritten or omitted.

To resolve this:

Verify that the binary field name (in this case, "after") you configured in the Edit Image node exactly matches the field name present in every incoming item. The field name is case-sensitive.
Check your loop configuration to make sure that each item maintains the same binary field name. If you’re renaming or creating new binary data, ensure that all items set the property with the expected key ("after").
If you need to process multiple binaries, consider splitting them so that each item contains only the binary data you intend to process with the Edit Image node.

Adjusting the field names consistently across your workflow should resolve the error.

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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