Update recognizableCharacters not working

[ferbruml]

Hi.
I've updated the recognizableCharacters variable to my new training data, e.g.:

recognizableCharacters = "ABCD123˜)(-"

But print(recognizableCharacters.count) is always the original 36 characters. So, after change recognizableCharacters, what is the next step to SwiftOCR working?