Hey thanks for answering!
Error level 0-2 codes are wokring, but errorlevel code 3 (Verify failed) is not working..
Can you please test it in your computer (try to burn iso to dvd-r wait for the verify after the burn and, for example, physically change the disk to another disk so the verify will fail - [when doing so I didn't get any error level, the GUI just told me that something is wrong, the GUI closed and errorlevel was 0, like everything is OK instead of 3]).
Thank you so much again!