jTessBoxEditor | Box editor and trainer for Tesseract OCR | Computer Vision library

I am trying to train Tesseract 4 with particular pictures (to read multimeters with 7 segments),

please note that I am aware of the allready trained data from Arthur Augusto at https://github.com/arturaugusto/display_ocr but I need to train Tesseract over my own data.

In order to train tess, I followed differents tutorials (as https://robipritrznik.medium.com/recognizing-vehicle-license-plates-on-images-using-tesseract-4-ocr-with-custom-trained-models-4ba9861595e7 or https://pretius.com/how-to-prepare-training-files-for-tesseract-ocr-and-improve-characters-recognition/)

but i allways get problem when running the shapeclustering command with my own data

(With example data as https://github.com/tesseract-ocr/tesseract/issues/1174#issuecomment-338448972, every things is working fine)

Indeed when I try to do the shapeclusturing command it have this output screenshot Then my shape_table is empty and the trainig could'nt be efficient...

With example data it's working fine and the shape_table is well filled

I am guessing that I have issue with box file generation, here is my process to create box file :

I use the