DT 4.4 on macOS 27: Fails once to OCR with Internal Program Error

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1

I have

  • an indexed folder on a NAS
  • a smart rule that watches this folder and converts incoming PDFs to PDF+Text with DT’s OCR
  • this worked flawlessly with DT4.3 and macOS 26.x

Now, I see this in the DT protocol, but only once (see below for follow-up)

21.09.26, 09:48:20: Unable to create an OCR document	
21.09.26, 09:48:20: Texterkennung von 'Scan_20260920_153242_000786' fehlgeschlagen.	
21.09.26, 09:48:20: Internal program error:
/Users/build/Build/TFS.Agent/_work/1/s/ROOT/FREngine/FREngine/src/FRDocument.cpp, 605.

Looks a bit weird to me, since I certainly never created a User named build on this machine, and there’s no build directory in my /Users.

Running OCR directly on the file works ok, BTW. So, here’s my smart rule:

Bildschirmfoto 2026-09-21 at 09.55.45
Bildschirmfoto 2026-09-21 at 09.55.451274×836 98.9 KB

The script at the end only removes empty pages from the OCR’d PDF. It did never run in this situation.

Now I moved the original document back from the trash into the indexed folder and run the rule directly on it – no problem whatsoever.

And I found out that FREngine is a part of Abbyy’s OCR engine that relies on Rosetta. Which is on it’s way out of macOS…

2

If FREngine is showing as using Rosetta then you have an old Intel version of the OCR installed. Try the following:

  • Quit DEVONthink
  • In Finder select the menu Go->Go to Folder and enter the line below before pressing Go.
    ~/Library/Application Support/DEVONthink/Abbyy
  • Select the file DTOCRHelper and drag to the trash
  • Open DEVONthink, select the menu DEVONthink->Install Add-Ons
  • Select ABBYY FineReader OCR and press install.

This should install the Apple Silicon version. Any problems let me know.

3

I followed your advice and will let you know if the issue arises again. Thanks!

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