Adding the results from Robobraille.
clearly this file has problems, even for accessibility focused tools.
Here is what I got.
From pony@robobraille.org Fri Oct 17 14:00:24 2025
Date: 17 Oct 2025 19:58:56 +0200
From: RoboBraille <pony@robobraille.org>
To: klewellen@shellworld.net
Subject: RoboBraille: Error in the conversion of nsccmaps.pdf
Sensus RoboBraille 5.04.04
Unable to convert the PDF document as it seems to be protected
Learn more about RoboBraille and accessibility conversion in module 4 of the e-learning course at https://access.sensus.dk/elearn/rb/en-gb/
The request was submitted to convert@robobraille.org from klewellen@shellworld.net
The request was completed on 17/10/2025 19.58. The submitted document was subsequently deleted from the RoboBraille service. The responding RoboBraille agent was rba13 (Hillerød).
You can contact Sensus ApS by mail to contact@robobraille.org or by calling +45 48 22 10 03. Read more about Sensus ApS on https://www.sensus.dk.
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best,
Kare