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Training Failed for AI Builder (Training report issue: TrainingInputNotFound)

I am trying to train Model for Invoice data extraction with 10 Similar invoice samples but I keep on getting error "Training report issue: TrainingInputNotFound"  am getting frustrated.. any suggestion here ? 


Community Support
Community Support

Hi @bilalrpadev 


Please check the requirements and limitations of Form processing AI model:


Form processing works on input documents that meet the following requirements:

  • JPG, PNG, or PDF format (text or scanned). Text-embedded PDFs are better, because there won't be any errors in character extraction and location.
  • If your PDFs are password-locked, you must remove the lock before submitting them.
  • The combined file size of the documents used for training must not exceed 50 MB and should not be more than 500 pages for PDF documents.
  • For images, dimensions must be between 530 x 100 and 4200 x 4200 pixels.
  • If scanned from paper documents, scans should be high-quality images.
  • Must use the Latin alphabet (English characters).


AI Builder does not currently support the following types of form processing input data:

  • Complex tables (nested tables, merged headers or cells, and so on)
  • Check boxes or radio buttons
  • Signatures
  • Fillable PDFs

Optimization tips

  • Use forms with different values in each field.
  • When you create a new form processing model, upload documents with the same layout where each document is a separate instance. For example: invoices from the same provider, but each uploaded invoice is from a different month.
  • If you are getting bad results or low confidence scores for certain fields, create a new Form Processing model and upload more documents. The more documents you tag, the more AI Builder will learn how to better recognize the fields.
  • You can optimize PDF files by using the Print > Print to PDF option to select certain pages within your document.

Hope this helps.


Hi @v-siky-msft  




Hi @bilalrpadev,


Apologies for the inconvenience. I have sent you a private message asking for more information about your model so we can investigate what is the issue and get you unblocked. 

Regular Visitor

I am also facing same issue.. Have you got the solution?

Hi @bilalrpadev , @Komal_f. can you check that all documents that you have uploaded don't exceed exceed 50 MB in size in total?

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