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Attempt to invoke virtual method 'void com.googlecode.tesseract.android.TessBaseAPI.stop()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.googlecode.tesseract.android.TessBaseAPI.stop()' on a null object reference	at com.kamron.pogoiv.OCRHelper.exit(Unknown Source)	at com.kamron.pogoiv.MainActivity.onDestroy(Unknown Source)	at android.app.Activity.performDestroy(Activity.java:7102)	at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1170)	at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:5047)	at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:5092)	at android.app.ActivityThread.access$1700(ActivityThread.java:221)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1853)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:158)	at android.app.ActivityThread.main(ActivityThread.java:7232)	at java.lang.reflect.Method.invoke(Method.java)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)