I was trying to use length on an array variable to get a count of how many items were in it, but it's resulting in a download link which then just gives me a JSON of the results.
I was taking the rows from a table, using a for each to append to an array variable, counting the variable, then doing a union to itself in an attempt to only have unique values, then counting it again to make sure the number is different.
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If you could provide an expanded screenshot of your Flow and steps, and of any detailed error messages you're receiving we could likely better assist you. Also, for the best results, you may want to review How to write a good forum post.
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It looks like your Compose step with the "length" was not input using the Expression field. I would suggest clicking on the field and then click on the "Expression" tab. Then use the "length" expression and add it that way.
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