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Building a flow using an expression for date and getting this error

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Posted on by PowerWork13

Unable to process template language expressions for action 'Condition' at line '0' and column '0': 'The template function 'lengthbody' is not defined or not valid.'.

The flow saves without errors and Flow checker has no errors, but when I run the test I get the error as pasted above. The expression I'm using is lengthbody('Select_-_7_Days_Collect_Values')

Relatively new to Power Automate so bear with me 🙂 any pointers greatly appreciated.

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Building flows

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @PowerWork13 ,

This is from a different example I was using but through a conditional action in here to show you the expression for length()

So here, I am entering an expression length() and then selecting my dynamic content inside the brackets and it looks like this:

Then saving. Please try. Save. Resubmit your last test run and let me know.

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trice602 15,402 Super User 2025 Season 2 on at

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Also note: I am not typing in anything other than length() -- the format including body is included with the dynamic content.

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