text: **7.2.1 Limitations**
  
  The maximum input file size that is supported by PDF Indexer is 4 GB. The amount of data 
  that can be processed from an input file is also limited by the amount of memory that is 
  available on the server on which you are running the PDF Indexer. The maximum size of a 
  single document within the input file that can be loaded into Content Manager OnDemand is 
  2 GB; however, we suggest that the size of a single PDF document does not exceed 50 MB. 
  
  Secure PDF documents are not supported. PDF Digital Signatures are not supported. If a 
  PDF document contains a digital signature, after indexing, the .out file does not contain the 
  digital signature. To load a file that contains a PDF Digital Signature, create a generic index 
  file for it, and load the file as one document. 