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Unable to process template language expressions in action 'XXX'

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Posted on by Community Power Pla... Microsoft Employee

Hi everyone,

My Flow process has just failed and flagged this error:

'Unable to process template language expressions in action 'Add_attachment_3' inputs at line '1' and column '11': 'The template language function 'body' cannot be used when the referenced action outputs body has large aggregated partial content. Actions with large aggregated partial content can only be referenced by actions that support chunked transfer mode.'.

An image of the flow is below. What the card does is to extract an attachment from an MS Form and transfer it into a SharePoint list. In this instance, it has failed and I cannot make heads or tails as of why. Does anyone know what this means?

Thanks v much in advance

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Chriddle 8,685 Super User 2026 Season 1 on at

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Logic Apps can't directly use outputs from chunked messages that are larger than the message size limit. Only actions that support chunking can access the message content in these outputs. So, an action that handles large messages must meet either these criteria:
Natively support chunking when that action belongs to a connector.
Have chunking support enabled in that action's runtime configuration.
https://learn.microsoft.com/en-us/azure/logic-apps/logic-apps-handle-large-messages#chunked-message-handling-for-logic-apps

Some actions (e.g "Create file") have following section in their settings:
Content Transfer Specify the behavior and capabilities for transferring content over HTTP. Large messages may be split up into smaller requests to the connector to allow large message upload. Details can be found at http://aka.ms/logicapps-chunk#upload-content-in-chunks Allow chunking

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Community Power Pla... Microsoft Employee on at

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Thanks @Chriddle - The challenge for us here is figuring out how to correct the flow to enable chunking. I checked the settings of each connection and I could not find a toggle to activate. Might you know how to manage this?

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Chriddle 8,685 Super User 2026 Season 1 on at

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Sorry, no solution 😞
I think your file is just too big to be processed this way. What is its size?
Maybe you should save this file in the document library and add a link to it to the list.

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Community Power Pla... Microsoft Employee on at

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Thanks for helping to gain clarity!

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Community Power Pla... Microsoft Employee on at

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And sorry, the file size is 10MB.

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