I have python program which uses tesseract ocr engine. At first it worked fine. However I uninstall tesseract and reinstall it this time it does not work.

It gives

pytesseract.pytesseract.TesseractError: (1, 'Error opening data file C:\\Program Files\\Tesseract-OCR/eng.traineddata Please make sure the TESSDATA_PREFIX

I did not change anything, but it does not work.

I add TESSDATA_PREFIX to the path.

But when I move eng.traineddata from tesstada to tesseract-ocr file it worked. I have another computer and also it has same program and it works well. However eng.traineddata is in tessdata folder.

Why is the one program gives an error, another is not ?

EDIT

1) 'C:\Program Files\Tesseract-OCR/eng.traineddata' does not exist in two computers. However one of them is working but the other is not working. Therefore As I stated in the question, I move eng.traineddata from tessdata to Tesseract-OCR folder and then it is worked. But here is the question why one of it is working and the other is not working ? Because other program does not have eng.traineddata in the Tesseract-OCR folder.

2) I downloaded the windows executable of tesseract from mannheim uni library. So file is not corrupted.

3)I am using Tesseract 3.05

4) I have created TESSDATA_PREFIX env variable.

5) I downloaded the windows executable of tesseract from mannheim uni library.

Thank you very much.