An issue with the default OCR engine has been detected and causing the stopping of the OCR process and consequently also the crashing of the Processing Service.
The issue can be identified with the stopping of the Process Service at the log line "Finalizing document..." and an entry in the Windows Events Viewer with an exception inside the Windows module ntdll.
The issue is originating starting of Microsoft Update KB4041686 which has been rolled up in several different cumulative updates for each Windows version as per follow:
Windows 10 Version 1607 - KB4056890
Windows 10 Version 1703 - KB4056891
Windows 10 Version 1709, Windows Server 2016 - KB4056892
Windows 10 Version 1709, Windows Server 2016 - KB4058702
Windows 8.1, Windows Server 2012 R2 Service Pack 1 - KB4056895
Windows Server 2012 R2 Service Pack 1 - KB4056896
Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1 - KB4056897
Windows 8.1, Windows Server 2012 R2 Standard - KB4056898
Windows Server 2012 Standard - KB4056899
Microsoft resolved the issue with the most recent updates as per follow:
Windows 10, Windows Server 2016 Version 1607 - KB4057142
Windows 10, Windows Server 2016 Version 1703 - KB4057144 - KB4284830
Windows 10, Windows Server 2016 Version 1709 - KB4058258 - KB4284822
Windows 10, Windows Server 2016 Version 1803 - KB4284848
Windows 8.1 - KB4057401 - KB4284863
Windows Server 2012 R2 Standard - KB4057401 - KB4284863
Windows Server 2012 Standard - KB4057402 - KB4284852
Windows Server 2008 R2 Service Pack 1 - KB4057400 - KB4284842
Windows 7 Service Pack 1 - KB4057400 - KB4284842
The resolving updates may not be listed as automatic updates so it is suggested to manually check the available updates including the optional ones.
Please note that the issue may still be present also after installing the mentioned updates because the original KB, producing the problem, is rolled-up in different cumulative's as well and they may also differ by system locale.
The issue follows the following updates history for Windows 7 and Windows 2008 systems:
KB4041686 (originating the problem) -> included in KB4048957 -> included in KB4051034 -> included in KB4054518 -> included in KB4056894 -> included in KB4057400 -> included in KB4074598 -> included in KB4075211 -> included in KB4088875 -> included in KB4088881 -> included in KB4093118 -> included in KB4093113 -> included in KB4103718 -> included in KB4103713 -> included in KB4284826 -> included in KB4284842
and the following update history for Windows 8 and Windows 2012 systems:
KB4041685 (originating the problem) -> included in KB4048958 -> included in KB4050946 -> included in KB4054519 -> included in KB4056895 -> included in KB4057401 -> included in KB4074594 -> included in KB4075212 -> included in KB4088876 -> included in KB4088882 -> included in KB4093114 -> included in KB4093121 -> included in KB4103725 -> included in KB4103724 -> included in KB4284815 -> included in KB4284863
*UPDATE*: The issue has been definitely solved with a patch also for the cases where it was still present after installing the resolving Microsoft updates. The patch is now available for all brands in all internal builds starting of v188.8.131.52 and it will rolled-up in the next official release v4.9.
*UPDATE 04/07/2018*: Microsoft has finally released the updates solving definitely the issue on all operating systems. The specific KB are mentioned in the list above and they are independent by the usage of the patch released with v4.9. In order to disable the v4.9 patch and roll-back to the default OCR engine behaviour edit the following registry key:
HKLM\Software\(WOW6432Node)\ScanshareV4\OmniPageUseWrapper -> Set the value to 0 (zero)