PDF Toolbox OCR corrupts some files

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  • Author
    Posts
  • 2024-06-18 at 02:55 #63514
    Lee Gillie, CCP
    Participant

    I have created 82 PDF using PDFSharp to create pages from individual JPG files. These all open with all readers I have tried with success. I then programmatically convert all 82 to searchable PDF using OCR:

    Private Function OCRDocumentAsync(OCRList As List(Of NewCaseDocument), report As DocumentOCRProgressReport) As Task
    Dim Success As Boolean = True
    Dim Err As Exception = Nothing
    Dim sb As New StringBuilder

    Dim caseDocument As NewCaseDocument

    For Each caseDocument In OCRList
    Dim outPath As String = Path.Combine(caseDocument.ParentCase.CaseDocumentsFolder, caseDocument.SearchablePath)
    Dim inPath As String = Path.Combine(caseDocument.ParentCase.CaseDocumentsFolder, caseDocument.OriginalPath)

    process = New Process()
    sb.Clear()
    sb.Append($" -outputFile ""{outPath}""")
    sb.Append(" -language eng")
    sb.Append(" -dpi 300")
    sb.Append(" -language eng")
    sb.Append(" -deskew")
    sb.Append(" -autoRotatePages")
    sb.Append(" """)
    sb.Append(inPath)
    sb.Append("""")

    With process.StartInfo
    .FileName = Pdf24ExecutablePath
    .Arguments = sb.ToString
    .UseShellExecute = False
    .RedirectStandardOutput = True
    .RedirectStandardError = True
    .CreateNoWindow = True
    End With

    process.Start()

    process.BeginOutputReadLine()
    process.BeginErrorReadLine()

    process.WaitForExit()
    process.Close()
    process.Dispose()
    process = Nothing

    report.OCRedDocuments += 1
    report.NotOCRedDocuments -= 1
    report.OCRedPages += caseDocument.DocumentPages.Count
    report.NotOCRedPages -= caseDocument.DocumentPages.Count

    UpdateOCRProgress(report)
    'cmp.CompressFile(outPath)
    Next

    End Function

    The issue is some percentage of these new documents can not be opened.

    Here is my processing log. The first file produced a correct pdf. The second did not

      ► OCR services provided by PDF24 Creator Version 11.18.0
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 1 through 1.
    Page 1
    Error:warning: ignoring zlib error: incorrect data check
        OCR page 1
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 2 through 2.
    Page 2
        OCR page 2
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" -v
    ----------------
    ================
    Optimizing PDF
    ================
    "C:\Program Files\PDF24\jre\bin\java.exe" -cp "C:\Program Files\PDF24\lib\jar\*" -Dwindows.acp=1252 -XX:MaxRAMPercentage=80 "org.pdf24.OcrPdfOptimizer" "-deskew" "H:\Spokane Court Cases\SN_2320522932\Documents\SN_2320522932_0101 Sub-1.0 2023-12-06 CASE INFORMATION COVER SHEET.pdf" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521603312_2282591701_opt.pdf"
    ----------------
    OPTIMIZE> PDF24 PDF OCR Optimizer
    OPTIMIZE>
    OPTIMIZE> 2024.06.17 18:25:09 main: Start
    OPTIMIZE> 2024.06.17 18:25:09 main: Images collected: 2
    OPTIMIZE> 2024.06.17 18:25:09 main: Processing image: 1/2
    OPTIMIZE> 2024.06.17 18:25:09 main: Skew angle: -0.01 deg
    OPTIMIZE> 2024.06.17 18:25:10 main: Processing image: 2/2
    OPTIMIZE> 2024.06.17 18:25:10 main: Skew angle: 0.07 deg
    OPTIMIZE> 2024.06.17 18:25:11 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:11 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:11 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:11 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:11 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:11 main: JPG quality: 0.45
    OPTIMIZE> 2024.06.17 18:25:11 main: Done
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=1 -dLastPage=1 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_1_521605640_1849103157.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521603312_2282591701_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_1_521605640_1849103157.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_2_521606234_1511152801" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=2 -dLastPage=2 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_3_521607093_842780324.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521603312_2282591701_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_3_521607093_842780324.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_4_521607921_209992862" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    Auto Rotating PDF Pages
    ================
    "C:\Program Files\PDF24\jre\bin\java.exe" -cp "C:\Program Files\PDF24\lib\jar\*" -Dwindows.acp=1252 -XX:MaxRAMPercentage=80 "org.pdf24.PdfPagesAutoRotator" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_5_521611093_2964690093_ocred.pdf" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_6_521611125_4089732727_rot.pdf"
    ----------------
    AUTOROT> PDF24 PDF Pages Auto Rotator
    AUTOROT>
    AUTOROT> Jun 17, 2024 6:25:17 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:25:17 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    ================
    -->
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" -v
    ----------------
    ================
    Optimizing PDF
    ================
    "C:\Program Files\PDF24\jre\bin\java.exe" -cp "C:\Program Files\PDF24\lib\jar\*" -Dwindows.acp=1252 -XX:MaxRAMPercentage=80 "org.pdf24.OcrPdfOptimizer" "-deskew" "H:\Spokane Court Cases\SN_2320522932\Documents\SN_2320522932_0102 Sub-2.0 2023-12-06 SUMMONS AND COMPLAINT.pdf" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    OPTIMIZE> PDF24 PDF OCR Optimizer
    OPTIMIZE>
    OPTIMIZE> 2024.06.17 18:25:18 main: Start
    OPTIMIZE> 2024.06.17 18:25:18 main: Images collected: 16
    OPTIMIZE> 2024.06.17 18:25:18 main: Processing image: 1/16
    OPTIMIZE> 2024.06.17 18:25:19 main: Skew angle: -0.01 deg
    OPTIMIZE> 2024.06.17 18:25:19 main: Processing image: 2/16
    OPTIMIZE> 2024.06.17 18:25:19 main: Skew angle: -0.02 deg
    OPTIMIZE> 2024.06.17 18:25:20 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:20 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:20 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:20 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:20 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:20 main: Processing image: 3/16
    OPTIMIZE> 2024.06.17 18:25:20 main: Skew angle: 0.12 deg
    OPTIMIZE> 2024.06.17 18:25:21 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:21 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:21 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:21 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:21 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:21 main: JPG quality: 0.45
    OPTIMIZE> 2024.06.17 18:25:21 main: Processing image: 4/16
    OPTIMIZE> 2024.06.17 18:25:21 main: Skew angle: -0.02 deg
    OPTIMIZE> 2024.06.17 18:25:22 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:22 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:22 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:22 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:22 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:22 main: Processing image: 5/16
    OPTIMIZE> 2024.06.17 18:25:22 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:22 main: Processing image: 6/16
    OPTIMIZE> 2024.06.17 18:25:22 main: Skew angle: 0.12 deg
    OPTIMIZE> 2024.06.17 18:25:23 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:23 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:23 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:23 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:23 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:23 main: JPG quality: 0.45
    OPTIMIZE> 2024.06.17 18:25:23 main: Processing image: 7/16
    OPTIMIZE> 2024.06.17 18:25:23 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:23 main: Processing image: 8/16
    OPTIMIZE> 2024.06.17 18:25:23 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:23 main: Processing image: 9/16
    OPTIMIZE> 2024.06.17 18:25:24 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:24 main: Processing image: 10/16
    OPTIMIZE> 2024.06.17 18:25:24 main: Skew angle: 0.04 deg
    OPTIMIZE> 2024.06.17 18:25:24 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:24 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:24 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:24 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.45
    OPTIMIZE> 2024.06.17 18:25:25 main: Processing image: 11/16
    OPTIMIZE> 2024.06.17 18:25:25 main: Skew angle: 0.05 deg
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:25 main: JPG quality: 0.45
    OPTIMIZE> 2024.06.17 18:25:26 main: Processing image: 12/16
    OPTIMIZE> 2024.06.17 18:25:26 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:26 main: Processing image: 13/16
    OPTIMIZE> 2024.06.17 18:25:26 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:26 maGPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 1 through 1.
    Page 1
    Error:warning: ignoring zlib error: incorrect data check
        OCR page 1
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 2 through 2.
    Page 2
        OCR page 2
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 3 through 3.
    Page 3
        OCR page 3
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    in: Processing image: 14/16
    OPTIMIZE> 2024.06.17 18:25:26 main: Skew angle: 0.00 deg
    OPTIMIZE> 2024.06.17 18:25:26 main: Processing image: 15/16
    OPTIMIZE> 2024.06.17 18:25:26 main: Skew angle: 0.01 deg
    OPTIMIZE> 2024.06.17 18:25:27 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:27 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:27 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:27 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:27 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:27 main: Processing image: 16/16
    OPTIMIZE> 2024.06.17 18:25:27 main: Skew angle: 0.12 deg
    OPTIMIZE> 2024.06.17 18:25:27 main: JPG quality: 0.95
    OPTIMIZE> 2024.06.17 18:25:28 main: JPG quality: 0.85
    OPTIMIZE> 2024.06.17 18:25:28 main: JPG quality: 0.75
    OPTIMIZE> 2024.06.17 18:25:28 main: JPG quality: 0.65
    OPTIMIZE> 2024.06.17 18:25:28 main: JPG quality: 0.55
    OPTIMIZE> 2024.06.17 18:25:28 main: Done
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=1 -dLastPage=1 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_1_521622312_1804220203.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_1_521622312_1804220203.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_2_521622859_496003721" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=2 -dLastPage=2 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_3_521623687_2842099538.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_3_521623687_2842099538.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_4_521624328_3083702292" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=3 -dLastPage=3 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_5_521626046_2867351540.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_5_521626046_2867351540.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_6_521626640_2826299966" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=4 -dLastPage=4 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_7_521627906_2967988794.png" "C:\Users\vGPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 4 through 4.
    Page 4
        OCR page 4
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 5 through 5.
    Page 5
        OCR page 5
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 6 through 6.
    Page 6
        OCR page 6
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 7 through 7.
    Page 7
        OCR page 7
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 8 through 8.
    Page 8
        OCR page 8
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    ulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_7_521627906_2967988794.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_8_521628484_2791072866" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=5 -dLastPage=5 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_9_521629812_3462384554.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_9_521629812_3462384554.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_10_521630546_3336302832" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=6 -dLastPage=6 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_11_521632312_4100019467.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_11_521632312_4100019467.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_12_521633062_1620023086" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=7 -dLastPage=7 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_13_521635015_3754366077.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_13_521635015_3754366077.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_14_521635734_2318769125" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=8 -dLastPage=8 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_15_521637500_3928551793.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_15_521637500_3928551793.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_16_521638250_458412466" "-l" "eng" "-c" "textonly_pdf=1GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 9 through 9.
    Page 9
        OCR page 9
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 10 through 10.
    Page 10
        OCR page 10
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 11 through 11.
    Page 11
        OCR page 11
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 12 through 12.
    Page 12
        OCR page 12
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    " "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=9 -dLastPage=9 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_17_521640140_3230207094.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_17_521640140_3230207094.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_18_521640906_576005624" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=10 -dLastPage=10 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_19_521642812_2030004272.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_19_521642812_2030004272.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_20_521643515_4149302819" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=11 -dLastPage=11 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_21_521645515_3442746883.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_21_521645515_3442746883.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_22_521646218_3074943341" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=12 -dLastPage=12 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_23_521648062_516607773.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_23_521648062_516607773.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_24_521648812_3910480455" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=13 -dLastPage=13 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFGPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 13 through 13.
    Page 13
        OCR page 13
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 14 through 14.
    Page 14
        OCR page 14
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 15 through 15.
    Page 15
        OCR page 15
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 16 through 16.
    Page 16
        OCR page 16
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    ile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_25_521650796_1918327845.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_25_521650796_1918327845.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_26_521651500_2346727403" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=14 -dLastPage=14 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_27_521653296_3034046508.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_27_521653296_3034046508.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_28_521654031_3145676435" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=15 -dLastPage=15 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_29_521655984_1101515219.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_29_521655984_1101515219.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_30_521656578_1760887125" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\gs\bin\gswinc.exe" -dBATCH -dNOPAUSE -dSAFER -dALLOWPSTRANSPARENCY "-sFONTPATH=C:\WINDOWS\Fonts;C:\Users\vulca\AppData\Local\Microsoft\Windows\Fonts" -dNEWPDF=true  -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -dFirstPage=16 -dLastPage=16 -sDEVICE=png16m -dDownScaleFactor=1 "-sOutputFile=C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_31_521658156_3219498737.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_0_521612437_3271843913_opt.pdf"
    ----------------
    ================
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" "--tessdata-dir" "C:\Users\vulca\AppData\Local\PDF24\tesseract\5.3.0\tessdata" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_31_521658156_3219498737.png" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_32_521658718_287257631" "-l" "eng" "-c" "textonly_pdf=1" "--dpi" "300" "--oem" "3" "--psm" "1" "pdf" "txt"
    ----------------
    TESS> Detected 20 diacritics
    ================
    Auto Rotating PDF Pages
    ================
    "C:\Program Files\PDF24\jre\bin\java.exe" -cp "C:\Program Files\PDF24\lib\jar\*" -Dwindows.acp=1252 -XX:MaxRAMPercentage=80 "org.pdf24.PdfPagesAutoRotator" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_33_521659859_1356719856_ocred.pdf" "C:\Users\vulca\AppData\Local\Temp\PDF24\ocr_34_521659906_1668589547_rot.pdf"
    ----------------
    AUTOROT> PDF24 PDF Pages Auto Rotator
    AUTOROT>
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    AUTOROT> Jun 17, 2024 6:26:06 PM org.apache.fontbox.ttf.PostScriptTable read
    AUTOROT> WARNING: No PostScript name data is provided for the font null
    ================
    -->
    GPL Ghostscript 10.03.1 (2024-05-02)
    Copyright (C) 2024 Artifex Software, Inc.  All rights reserved.
    This software is supplied under the GNU AGPLv3 and comes with NO WARRANTY:
    see the file COPYING for details.
    Processing pages 1 through 1.
    Page 1
    Error:warning: ignoring zlib error: incorrect data check
        OCR page 1
    Error:warning: ignoring zlib error: incorrect data check
    Error:warning: ignoring zlib error: incorrect data check
    ================
    "C:\Program Files\PDF24\tesseract\tesseract.exe" -v
    ----------------
    ================
    Optimizing PDF
    ================

    I recently installed the current version in an update (shown in the above log), but the prior version had this problem as well.

    Any hints or ideas would be greatly appreciated.

    2024-06-18 at 07:16 #63515
    Stefan Ziegler
    Keymaster

    What immediately strikes me here is the following:

    Error:warning: ignoring zlib error: incorrect data check

    Seems that some data objects have deflate encoding issues..

    can you send me such a file to forum@pdf24.org?

    2024-06-18 at 15:52 #64564
    Lee Gillie, CCP
    Participant

    Thank you Stefan. I have e-mailed 2 files which OCR just fine, and 2 files that become corrupted. - Lee

    2026-10-30 at 20:51 #65472
    PDF24 Support
    Moderator

    Hello,

    the warning "ignoring zlib error: incorrect data check" means that compressed data in these PDF files has a wrong checksum. Many PDF readers tolerate this, but it can break the processing during OCR.

    Does this still happen with the current version of PDF24 Creator? If yes, please send us the files again (also the ones you sent by e-mail back then), so that we can reproduce this, with this button:

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