Uploading pdf file using Flows on Power automate

(1) Share

Report

Posted on by Taka.T

I've been trying to import pdf file (w9 file) to Vendor document attachment entity but it shows "We can't open this file" in Preview and it looks like the file was not imported into D365FO. Tried to open the file (download the file) but it was not readable.

Does anyone know how to solve the problem or how to upload pdf file to Vendor master using power automate?

My ultimate goal is scan the documents (vendor request form and W9) from procurement team and create the vendor master and attach pdf W9 form to the vendor.

Here is the message on Preview.

Here is my flows. Maybe Initialize the variable and set the variable parts are not necessary. I was just following guidance from someone's blog.

1. Upload the file

2. Initialize the "FileContents" as String

3&4. For Parse Jason and Compose parts, I just removed unnecessary text from contents.

example:

Original text >> {"contentBytes":"dGVzdA==","name":"test.txt"}
After3&4 >> dGVzdA==

5. Set Output from Compose to Variable "FileContents".

6. Adding new row in Vendor document attachments entity. In Archive file field, I convert String to Base64. Used this Expression: base64(variables('FileContents'))

I have the same question (0)

All responses (3)

Answers (1)

Jonas "Jones" Melgaard 4,855 Super User 2025 Season 2 on at

Like (0)

Report

Uploading pdf file using Flows on Power automate

No problem! I'm glad to hear you got it working (-:

Yes, you need to regenerate the schema after you change the trigger action, since the JSON output schema is not guaranteed to be identical.

You might not even need to parse the output of the trigger, since Power Automate should already have done it for you.

If it's okay, are you able to create a new question if you have issues after we have fixed this?

Them other community members can help also (-:

Was this reply helpful? Yes No
Taka.T 13 on at

Like (0)

Report

Uploading pdf file using Flows on Power automate

Thank you Jonas,

This works perfectly!!

But I got another error message after changing the trigger to email.

Do you know why and solution for that?

[

  {

    "message": "Invalid type. Expected Object but got Array.",

    "lineNumber": 0,

    "linePosition": 0,

    "path": "",

    "schemaId": "#",

    "errorType": "type",

    "childErrors": []

  }

]

Was this reply helpful? Yes No
Verified answer

Jonas "Jones" Melgaard 4,855 Super User 2025 Season 2 on at

Like (1)

Report

Uploading pdf file using Flows on Power automate

You actually don't need to do any type conversion, just use the contentBytes from FileContent; But you have to tell PowerAutomate it's a string.

If you do a base64 on it, it will be a base64 encoded base64 string.

This is my example flow:

The formula for "Archive file" is "string(triggerBody()?['file']?['contentBytes'])"

The attachment will look like this:

Was this reply helpful? Yes No