Hi vinhphamvn! Looks there are some encoding problems in the ISN. I attached a fixed exe..please can you test it? Do the following: Edit your testfile with for example Scite4AutoIt. In the file you will see the "wrong" text. Correct it as it should be. Use my new AutoIt Studio exe and try if ISN opens/saves the file now correctly. (UTF-8 mode must be enabled in the settings) Thanks for your help! [removed]