Hi, I want to create a song in the program but it keeps on giving me this weird error.

I've updated to the newest version.

 

Any idea ?

 

http://i.imgur.com/FNUC7ZO.png

I think 1 or more of you tones are not working properly, i may be wrong

I got the same error with the latest beta version of the toolkit and reverted back to an older build (bc4b8042).

Well error at the tones section, so maybe it's not that well-tested, I can check against your project if you want

EDIT:
fixed in last beta