OCR no longer works in version 8.1.1

[TheBastelWastl]

OCR no longer works for me in the portable version of NAPS2 8.1.1. In the portable version 7.5.3.0 this still worked. I am using Windows 10 64bit.

Here is the error message from the errorlog.txt:

2025-03-22 13:19:47.2922 3472 Error running OCR System.IO.FileNotFoundException: Could not find file 'D:\NAPS\Data\temp\2l3qnth3.4gd.hocr'.
File name: 'D:\NAPS\Data\temp\2l3qnth3.4gd.hocr'
at SafeFileHandle Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(string fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options)
at SafeFileHandle Microsoft.Win32.SafeHandles.SafeFileHandle.Open(string fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize, UnixFileMode? unixCreateMode)
at new System.IO.Strategies.OSFileStreamStrategy(string path, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize, UnixFileMode? unixCreateMode)
at FileStreamStrategy System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(string path, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize, UnixFileMode? unixCreateMode)
at new System.IO.FileStream(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize)
at Stream System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials, IWebProxy proxy)
at void System.Xml.XmlTextReaderImpl.FinishInitUriString()
at XmlReader System.Xml.XmlReaderSettings.CreateReader(string inputUri, XmlParserContext inputContext)
at XDocument System.Xml.Linq.XDocument.Load(string uri, LoadOptions options)
at async Task NAPS2.Ocr.TesseractOcrEngine.ProcessImage(ScanningContext scanningContext, string imagePath, OcrParams ocrParams, CancellationToken cancelToken)

If I watch the D:\NAPS\Data\temp\ folder I see that it creates a .jpg-file after a scan but no .hocr-file.

[cyanfish]

Are there any other messages in the error log? If you open a terminal in the NAPS2 folder and run .\App\lib\_win64\tesseract.exe --version what does it show? Do you have a sample PDF that OCRs correctly in 7.5.3 but not 8.1.1?

[TheBastelWastl]

Hi, here the version message of tesseract.exe from version 8.1.1.0:

D:\NAPS>.\App\lib_win64\tesseract.exe --version
tesseract 5.5.0
leptonica-1.85.0 (Jan 18 2025, 15:08:22) [MSC v.1940 LIB Release x64]
libgif 5.2.2 : libjpeg 9f : libpng 1.6.45 : libtiff 4.7.0 : zlib 1.3.1 : libwebp 1.5.0 : libopenjp2 2.5.3
Found AVX2
Found AVX
Found FMA
Found SSE4.1

In 7.5.3, every OCR scan works perfectly, in 8.1.1 I always get the same error message (see attached screenshot).
Version 7.5.3 creates two files during the scan in the NAPS\data\temp folder (.png and .hocr, Version 8.1.1 creates only on file (.png). I also attached two sample PDF-files. The error message I posted above is the only one that appears with every scan, there are no other errors.

Scan_OCR_v7.5.3.0.pdf
Scan_OCR_v8.1.1.0.pdf

[cyanfish]

Can you try this test version, try running OCR, then attach the errorlog.txt here?

[TheBastelWastl]

Thanks for your effort. Here the log:

errorlog.txt

[RoPoXx]

Hello, I have the same problem using the new version 8.1.1, I am attaching the logs to help. One detail, on my personal machine with Windows 11 it works normally. However, on my work machines with Windows 10 the error occurs. Using Naps2 v.7 it works normally on any Windows. If you need me to do any additional testing, I am available.

debuglog.txt
errorlog.txt

[rmmbr]

OCR no longer works for me in the portable version of NAPS2 8.1.1. In the portable version 7.5.3.0 this still worked. I am using Windows 10 64bit.

Here is the error message from the errorlog.txt:

2025-03-22 13:19:47.2922 3472 Error running OCR System.IO.FileNotFoundException: Could not find file 'D:\NAPS\Data\temp\2l3qnth3.4gd.hocr'. File name: 'D:\NAPS\Data\temp\2l3qnth3.4gd.hocr' at SafeFileHandle Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(string fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options) at SafeFileHandle Microsoft.Win32.SafeHandles.SafeFileHandle.Open(string fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize, UnixFileMode? unixCreateMode) at new System.IO.Strategies.OSFileStreamStrategy(string path, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize, UnixFileMode? unixCreateMode) at FileStreamStrategy System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(string path, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize, UnixFileMode? unixCreateMode) at new System.IO.FileStream(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize) at Stream System.Xml.XmlDownloadManager.GetStream(Uri uri, ICredentials credentials, IWebProxy proxy) at void System.Xml.XmlTextReaderImpl.FinishInitUriString() at XmlReader System.Xml.XmlReaderSettings.CreateReader(string inputUri, XmlParserContext inputContext) at XDocument System.Xml.Linq.XDocument.Load(string uri, LoadOptions options) at async Task NAPS2.Ocr.TesseractOcrEngine.ProcessImage(ScanningContext scanningContext, string imagePath, OcrParams ocrParams, CancellationToken cancelToken)

If I watch the D:\NAPS\Data\temp\ folder I see that it creates a .jpg-file after a scan but no .hocr-file.

Confirmed on my machine: Windows 11 24H2 and NAPS 8.1.1. Exactly the same stacktrace. Normal bitmap-scanning is ok.

After reverting to NAPS 7.5.3 all problems are gone.

[RoPoXx]

Consulting the Windows Event Viewer I have the following error registered:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Application Error" /> 
  <EventID Qualifiers="0">1000</EventID> 
  <Version>0</Version> 
  <Level>2</Level> 
  <Task>100</Task> 
  <Opcode>0</Opcode> 
  <Keywords>0x80000000000000</Keywords> 
  <TimeCreated SystemTime="2025-03-25T20:14:35.4845135Z" /> 
  <EventRecordID>2787</EventRecordID> 
  <Correlation /> 
  <Execution ProcessID="0" ThreadID="0" /> 
  <Channel>Application</Channel> 
  <Computer>TST000600</Computer> 
  <Security /> 
  </System>
- <EventData>
  <Data>tesseract.exe</Data> 
  <Data>0.0.0.0</Data> 
  <Data>678c3488</Data> 
  <Data>MSVCP140.dll</Data> 
  <Data>14.32.31326.0</Data> 
  <Data>7255e0ca</Data> 
  <Data>c0000005</Data> 
  <Data>0000000000013278</Data> 
  <Data>2250</Data> 
  <Data>01db9dc28699fd2a</Data> 
  <Data>C:\Program Files\NAPS2\lib\_win64\tesseract.exe</Data> 
  <Data>C:\WINDOWS\SYSTEM32\MSVCP140.dll</Data> 
  <Data>626ab2da-cb63-46d5-959d-a64d356c5176</Data> 
  <Data /> 
  <Data /> 
  </EventData>
  </Event>

[rmmbr]

Informations from my system from "perfmon /rel" (Language German):

Quelle
tesseract.exe

Zusammenfassung
Nicht mehr funktionsfähig

Datum
‎25.‎03.‎2025 14:53

Status
Der Bericht wurde gesendet.

Beschreibung
Pfad der fehlerhaften Anwendung: C:\Program Files\NAPS2\lib_win64\tesseract.exe

Problemsignatur
Problemereignisame: APPCRASH
Anwendungsname: tesseract.exe
Anwendungsversion: 0.0.0.0
Anwendungszeitstempel: 678c3488
Fehlermodulname: MSVCP140.dll
Fehlermodulversion: 14.34.31931.0
Fehlermodulzeitstempel: d1597dcd
Ausnahmecode: c0000005
Ausnahmeoffset: 0000000000013008
Betriebsystemversion: 10.0.26100.2.0.0.256.48
Gebietsschema-ID: 1031
Zusatzinformation 1: 5401
Zusatzinformation 2: 540142b99ebb50dfd6aae3ef73c7c045
Zusatzinformation 3: f748
Zusatzinformation 4: f74868642e369f104fa0f53666781a20

Weitere Informationen über das Problem
Bucket-ID: ad95c97fa09746fe96147180ec69baa7 (1591021366904732327)

[rmmbr]

The title of the issue should be changed to "OCR no longer works in the portable version 8.1.1", because the problem exists in the normal 64-bit-version too ...

[cyanfish]

Can you try installing (or reinstalling) the Microsoft VC++ Redist?

[cyanfish]

And if that doesn't work, can you check which version of Windows 10 you have?

[TheBastelWastl]

Can you try installing (or reinstalling) the Microsoft VC++ Redist?

This worked for me! OCR runs without issues and the resulting PDF is searchable.
Many thanks for your support!

[cyanfish]

@rmmbr Did you install using the MSI or EXE installer? If the redist fixes it then using the MSI could be the issue, as the EXE will install it for you but the MSI/portable wont.

[RoPoXx]

I have many VMs available here, I'll do some tests, using MSI and EXE.