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3288104 - Unable to attach PDF - Read error during PC upload: An error occurred when uploading to SAP Knowledge Provider


The following issue is being faced when trying to upload a PDF to a Sales Order or Billing Document:

"Read error during PC upload: An error occurred when uploading to SAP Knowledge Provider"

If you click on the "More Info" button, the message displayed is:

"An error occurred when uploading to SAP Knowledge Provider.

Check the following possible causes:

  • The document may already be open in an external application.
    In this case, close the application and try again.
  • The system was not able to access an external content server or an external archive."

This only happens with certain PDF documents. When trying to attach a different PDF, the upload works.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."



  • SAP S/4HANA Cloud


SAP S/4HANA Cloud all versions ; SAP S/4HANA all versions


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