ocr trainer not train

i have 300 referance of 1 digit. and while train multiple referance at same time, it not save multiple reference , but it also train only 1 reference at a time. i need solution, why i'm facing this issue. help me out

[Image Analyst]

If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

https://www.mathworks.com/matlabcentral/answers/1669139-using-mnist-in-matlab?s_tid=srchtitle