Thank you for the feedback gegu! As far as I am aware, there has never been an issue regarding the sync button causing a crash while generating, so this is not old news to me.

In order to help determine the cause of the crash, I will need you to provide me with the following files:
1. C:\Users\Public\Ticket\BBPluginDebug.txt
2. bb\BBPlugin\SavedTracks\BBInput.txt
3. bb\BBPlugin\SavedTracks\BBOutput.txt
4. bb\BBPlugin\SavedTracks\BBSong.txt

*Note that files 2, 3, and 4 require the presence of this text file: "bb\BBPlugin\PreserveAllFiles.txt". All of the files should be acquired immediately after the crash.

Could you also provide me with a saved song file (.sgu) as well as the exact steps you took to reproduce this crash? This should include details like which style/other tracks are loaded and any other information that may affect the way the song is generated.

If you have a screen recording program (like OBS which is free), it would be great if you could share a video of your screen leading up to a crash. This is often the easiest way for me to determine what the cause of the crash is.

You can upload all this information here or email me directly at aguy@pgmusic.com. I will do everything I can to help you resolve this issue!