What type of error is this?

I am a complete beginner in matlab. I was solving some machine learning problem. When I ran the program an error ocurred and when I again opened the script , something like this showed up.

Answer 1

[Walter Roberson]

You accidentally save()'d variables on top of a code file.

The code is gone. But you might be able to get something useful from the file with the same name that is one directory level higher.