# Known limitations

> This page provides an overview of the current specifications and parameters for optimal utilization of Document Understanding<sup>TM</sup> modern projects.

This page provides an overview of the current specifications and parameters for optimal utilization of Document Understanding<sup>TM</sup> modern projects.

## Project-based limits

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    Description 
    Limit 
  
 
 
  
    Supported file formats 
   
      
         PNG 
         JPG/JPEG 
         PDF 
         TIF/TIFF 
      

  
  
    Image size limits 
   
      
         Minimum: 50 x 50 pixels 
         Maximum: 10,000 x 10,000 pixels 
      

  
  
    Maximum number of pages in a document type 
    5000  After a certain point, adding more data doesn't improve model performance. This limitation makes sure that you do not annotate more documents than needed.  
  
  
    Maximum number of pages in a document 
    500 for previous generation models, 100 for Helix Extractor models 
  
  
    Maximum number of pages in a project 
    30,000 
  
  
    Maximum number of pages per document for pre-labeling 
    20  If a documents has more than 20 pages, only the first 20 pages are pre-annotated.  
  
  
    Maximum number of fields 
    300 
  
  
    Maximum number of requests processed in parallel 
    10 
  
  
    Maximum number of pages for out-of-the-box model processing 
    20 
  
  
    Maximum file size for digitization 
    160 MB 
  
  
    Maximum pages per document for digitization 
    500 pages 
  
  
    Number of characters for the classification name 
   
      
         Minimum: 1 
         Maximum: 50 
      

  
  
    Number of characters for the classification description 
   
      
         Minimum: 0 
         Maximum: 2000 
      

  
  
    Number of characters in a document for classification 
   
      
         Minimum: 0 
         Maximum: 1e10 (virtually unlimited) 
      

  
  
    Number of of classifiers 
   
      
         Minimum: 1 
         Maximum: 50 
      

  
 

## Activity or API-based limits

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  <col/>
  <col/>
 </colgroup>
 
  
    Description 
    Limit 
  
 
 
  
    Supported file formats 
   
      
         PNG 
         JPG/JPEG 
         PDF 
         TIF/TIFF 
      

  
  
    Image size limits 
   
      
         Minimum: 50 x 50 pixels 
         Maximum: 10,000 x 10,000 pixels 
      

  
  
    Maximum file size for digitization 
    160 MB 
  
  
    Maximum number of requests processed in parallel (a project version deployed in a modern project) 
    10 
  
  
    Maximum number of pages for out-of-the-box model processing 
    20 pages 
  
 

## Current limitations when migrating existing AI Center-based projects

* Currently, importing datasets larger than 3000 pages is not supported. Only the initial 3000 pages will be successfully imported, with any additional pages failing to do so. For example, if your dataset consists of 2999 pages and you try to import a document of 4 pages, the process will not succeed.
* Batch names and corresponding batch results are not currently available. If your data is organized into batches, this information is not displayed yet, but it is saved.
* Exports from AI Center are not supported. Only exports from Document Manager are supported.