Tesseract "java.lang.IllegalArgumentException. Data path must contain subfolder tessdata"

Question

I am trying to use the tesseract libray for java in my Android application as suggested here: http://vkedco.blogspot.com/2013/03/vladimir-kulyukin-learning-objectives-1.html

I have followed the instructions as it is and I still get an error that says that I need to have the subfolder tessdata in the path. The subfolder does exist in my sdcard/tesseract_languages folder.

Any suggestions about what I should do to get this running?

Error details are given below:

05-13 20:54:35.653: E/AndroidRuntime(11715): FATAL EXCEPTION: main
05-13 20:54:35.653: E/AndroidRuntime(11715): Process: com.example.msapp2, PID: 11715
05-13 20:54:35.653: E/AndroidRuntime(11715): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.msapp2/com.example.msapp2.MainActivity}: java.lang.IllegalArgumentException: Data path must contain subfolder tessdata!
05-13 20:54:35.653: E/AndroidRuntime(11715):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
05-13 20:54:35.653: E/AndroidRuntime(11715):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
05-13 20:54:35.653: E/AndroidRuntime(11715):    at android.app.ActivityThread.access$800(ActivityThread.java:135)
05-13 20:54:35.653: E/AndroidRuntime(11715):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)

We have to maintain folder structure according to this. Don't forget to maintain language file inside of this folder — Bahu
– Bahu, Commented Jun 9, 2018 at 18:12

yushulx · Accepted Answer · 2014-12-17 07:59:06Z

2

I met the same issue. When reading the source code, I found:

public boolean init(String datapath, String language) {
        if (datapath == null)
            throw new IllegalArgumentException("Data path must not be null!");
        if (!datapath.endsWith(File.separator))
            datapath += File.separator;

        File tessdata = new File(datapath + "tessdata");
        if (!tessdata.exists() || !tessdata.isDirectory())
            throw new IllegalArgumentException("Data path must contain subfolder tessdata!");

        return nativeInit(datapath, language);
    }

which means don't add "tessdata" to the datapath. The method init() will add it.

answered Dec 17, 2014 at 7:59

yushulx

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Daniel Galion Over a year ago

Thanks for advice. I've also read sources and I have omitted this detail.

georgepmarques · Accepted Answer · 2015-01-29 16:08:19Z

0

I was facing the same problem. Worked for me when I removed "tessdata" from the path, as yushlx answer.

Before (fail): path = "/mnt/sdcard/tesseract/tessdata"; After (success): path = "/mnt/sdcard/tesseract/";

Of course, tessdata folder should be in the path with the desired.traineddata file.

answered Jan 29, 2015 at 16:08

georgepmarques

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