How to add multiple variables while sending email

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Posted on by MTNK

819 Super User 2025 Season 2

Good morning everyone,

My flow is having two variables, either I can add Attachments or Word variable once in email Attachment section. How I can add both.

(I tried adding both separately , it is working however I need both variables to be send in same email.

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Error - Flow save failed with code 'OpenApiOperationParameterValidationFailed' and message 'Input parameter 'emailMessage' validation failed in workflow operation 'Send_an_email_(V2)': The parameter with value '" @{variables('Word')}@{variables('Attachments')}"' in path 'emailMessage/Attachments' with type/format 'String' is not convertible to type/format 'Array'.'.

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Expiscornovus 33,195 Most Valuable Professional on at

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Hi @FnuMeenu,

The attachments field expects one array, you are adding two.

You can merge the two by using an union function.

Below is an example

union(variables('Attachments'),variables('Word'))

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