Send Email V2 How to send multiple attachment with dynamic number of file

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Posted on by CU02101828-0

Hi.

I'm having trouble adding multiple attachment using file path to send an email (v2). I try to using custom object to store the Name and ContentBytes, then pass the custom object to the List. But I encountered some error "Cannot convert the literal '%BinaryData%' to the expected type 'Edm.Binary'"

this is my custom object

I try to hardcode the attachment and success with this list

And this is the list I create using custom object

The error is

Cannot convert the literal '%BinaryData%' to the expected type 'Edm.Binary'

this look like similar list to me, please anyone, thank you in advance

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Power Automate Desktop

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eetuRobo 4,204 Super User 2025 Season 2 on at

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Your ListAttachments binary data on the second item seems to be missing %-signs around it. BinaryData2 seems to be just text and not a variable.

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CU03100533-0 2 on at

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Thank you for reply, that is my test list, but this is the final list I have edit the BinaryData2 as var, but still have the same error, actually the error is in BinaryData, not the BinaryData2, the error is "message": "Unable to read message or attachment content.\r\nclientRequestId: b7db16f1-99e0-4191-bc28-736815c7ba2d,b08b9e67-9a42-449a-a1fa-3688b815f7a5\r\nserviceRequestId: f38c6c6d-aec6-a035-fc17-29ed39e442f2",
"error": {
"message": "Unable to read message or attachment content.",
"code": "RequestBodyRead",
"originalMessage": "Cannot convert the literal '%BinaryData%' to the expected type 'Edm.Binary'."
},
"source": "office365-sea.azconn-sea-001.p.azurewebsites.net"
},

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eetuRobo 4,204 Super User 2025 Season 2 on at

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Make sure your BinaryData -variables are refering to variables and not text.
Like so:

So no quotation signs around BinaryData -variables:

Should look like this:

Send an email (V2) Attachments field is not very responsive and I suggest you clear it and select the variable again. That fixed bad request error for me even when my flows logic correct.

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MtryDoc 55 on at

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Here is how I was taught to get this working. I am getting my attachments from a SPO List.

Here is very good breakdown in video form

https://www.youtube.com/watch?v=8X40YFo0BmY

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CU02101828-0 6 on at

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Thank you all for the reply, this issue was solved by make sure the file name and binary is variable instead of string, big thanks for eetuRobo for the advice. Thanks to for MtryDoc but I'm using Power Automate Desktop that have a different approach with Cloud one, but the issue is already solved. Thanks all for the reply and have a nice day!

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