Error: You have not tagged any characters

[pendex900x]

When I use the command "openalpr-utils-classifychars us [folder_with_plates] [empty folder]"

Appears this: http://prntscr.com/n7ok3o

Then I press space to mark it (in blue), like this: http://prntscr.com/n7oki1

Then what is supposed to do? I tried to move with arrow keys, press enter or the characters, but nothing works.

If I press space and then the letter S, or when I press arrows keys, appears: 'You have not tagged any characters', Obviously I have not labeled any character, if I can't.

The name of files are like: [country]plate1.png -> chplate1.png
And weight min. 250px.

Please do you know what can I do??

[BasuraRatnayake-zz]

same here, can someone help to proceed forward with this

[pmundt]

I ran into the same problem in a recent version of Ubuntu (20.04). It turned out to be a problem with the scan codes, which I worked around by converting the waitKey instances to waitKeyEx, enabling the debug statement at the bottom of the character loop, and fixing up the scan codes for the left/right and enter keys. It worked ok after this.