If you encounter this error message when opening a pdf in your web browser (Chrome, Firefox, Edge, etc.) please do the following:


  1. Download the pdf. (Look for the download option in the top left of your browser.)
  2. Open your Downloads folder.
     
  3. Open the pdf you just downloaded, using Adobe Acrobat.
    If double-clicking on the pdf opens it in your browser instead, right-click on the pdf and select 'Open With > Adobe Acrobat Reader'.


This error message occurs because the file you are trying to view was created using a defunct pdf editor program, which modern web browsers no longer support. However, the old pdf format should still be readable by Adobe Acrobat.