Power Platform Community Forum Thread Details

Hi, I'm relatively new to the power platform and this is my first attempt at building an AI model for automation. When I created the first cloud flow and tested it I got the following error;

{"operationStatus":"Error","error":{"type":"Error","code":"InvalidPredictionInput","message":"The base 64 binary content is missing for input single","properties":{"BackendErrorCode":"InvalidInferenceInput","DependencyHttpStatusCode":"400"},"innerErrors":[{"scope":"Record","target":"single","code":"InvalidRecord","type":"Error","properties":{"MlIssueCode":"InvalidRecord","MlIssueTarget":"single"}}]},"predictionId":null}

What I am attempting to do is to extract information from a PDF file which contains certain data and populate that information in to an excel table.

Categories:

Building flows

@용장-15050038-0

Thanks for sharing the error and your goal — you're on a great learning path with Power Platform and AI Builder! Let's break down the issue and guide you toward a working solution.

❌ Error Explanation

The error message:

"InvalidPredictionInput": "The base 64 binary content is missing for input single"

means that the AI model (likely a form processing model) expected a PDF file in base64 format, but it didn’t receive it correctly.

✅ What You’re Trying to Do

You want to:

Receive a PDF file.
Extract structured data from it (e.g., invoice, order, etc.).
Populate an Excel table with that data.

🛠️ How to Fix It

✅ 1. Ensure the PDF is passed correctly to the AI model

If you're using a form processing model, it expects the PDF file as a base64-encoded binary. In Power Automate:

Use the "Get file content" action (e.g., from SharePoint, OneDrive, or email).
Pass the output to the AI Builder "Predict" action.

Example flow:

Trigger → Get file content → AI Builder Predict → Parse results → Add row to Excel

Make sure the "File Content" field in the Predict action is filled with the output from "Get file content".

✅ 2. Use the correct AI model type

If your PDF has a consistent layout (e.g., invoices, forms), use Form Processing.
If you're extracting text from unstructured documents, use Document Processing or Custom AI model.

✅ 3. Excel Table Setup

Create an Excel file with a table (Insert → Table).
Use "Add a row into a table" action in Power Automate.
Map the extracted fields from the AI model to the Excel columns.

🧪 Test It Step-by-Step

Upload a sample PDF to SharePoint or OneDrive.
Create a flow:
- Trigger: Manual or file upload.
- Get file content.
- Predict with AI Builder.
- Add row to Excel.
Run the flow and check each step’s output.

🏷️ Tag me if you have any further questions or if the issue persists. ✅ Click "Accept as Solution" if my post helped resolve your issue—it helps others facing similar problems. ❤️ Give it a Like if you found the approach useful in any way.