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Morten38294782o22u
Participant
June 27, 2024
Answered

Acrobat Accessibility: Characters in a text object cannot be mapped to Unicode

  • June 27, 2024
  • 1 reply
  • 3147 views

Hi there,

As part of my job, I am performing tagging in Acrobat Pro. As I was checking my document in PAC2021, the error message 'Characters in a text object cannot be mapped to Unicode' showed itself. I have no idea how to fix this issue.

 

Any help is received with great gratitude 🙂

Kind Regards,

Morten

    Correct answer Karl Heinz Kremer

    This is very likley a font issue. A "good" font will have a "toUnicode" table that allows you to map a glyph (the "drawing" of one or more characters) back to the Unicode codes involved. For standard characters that is pretty straight forward, but you also have to consider ligatures, where one glyph actually represents more than one character. Without that table, it's impossible to perform that mapping. 

    1 reply

    Karl Heinz Kremer
    Community Expert
    Karl Heinz KremerCommunity ExpertCorrect answer
    Community Expert
    June 27, 2024

    This is very likley a font issue. A "good" font will have a "toUnicode" table that allows you to map a glyph (the "drawing" of one or more characters) back to the Unicode codes involved. For standard characters that is pretty straight forward, but you also have to consider ligatures, where one glyph actually represents more than one character. Without that table, it's impossible to perform that mapping. 

      M
      morten_7701
      Participant
      April 2, 2025

      Dear Karl,

      Thank you for your answer. I'm still not quite sure how I fix this issue using Acrobat - are you able to assist me with a guide or something of the sorts? 🙂

      Karl Heinz Kremer
      Community Expert
      Karl Heinz KremerCommunity Expert
      Community Expert
      April 2, 2025

      Unfortunately, there is no easy way to fix this. In some cases, it's possible that you can fix issues in PDF files using the preflight tool in Adobe Acrobat Pro. If you can, it's easier to just recrete the PDF file using a tool that will create good PDF files. 

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