Installation of ABBYY FineReader Engine 12 fails with the error "The path is not of a legal form"


When you install FineReader Engine on a machine where the previous build has been installed, you might face the exception "The path is not of a legal form".


This issue may occur because the old build was not completely removed before installation.


There are a few steps to fix this:

  1. Check and remove all unnecessary entities from registry Computer\HKEY_CURRENT_USER\SOFTWARE\ABBYY\SDK\12\Installations\
  2. Unregister FREngine.dll manually using the following command:
    regsvr32.exe /u "<path to FREngine.dll>"
    And register it once again with:
    regsvr32 /s /n /i:"<path to the Inc folder>" "<path to FREngine.dll>"

Please find more information in the Developer's Help.

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