Hi sitt01,

Yes: "too many voices" is just a message saying I was too lazy and I can only display around 15 voices. The rest is not displayed, but it does not affect the operation of the program in a ny way. Just ignore the message. It is just a warning.

Now, I need to ask a few questions about what you are trying to do.

1- What is your original 3790 fw? Is it US or Thai?

2- You have a Thai fw and you converted it to US fw using RGN Tool. Why do you want to convert narisa_tts? Is it because it does not work by default?

The "convert" button is only for non-TTS voices. Narisa is a TTS voices. It explains why the program crashes. In your case, I would simply replace a TTS voice (in the left), but Narisa (on the right). Is Narisa in my list? If not, I can add it if you want.