Thanks a bunch, I send you a link to the project (my provider doesn't permit attached files bigger than 2 MB...).
I hope you don't mind it is unpublished because I was unsure about the effect of warn_level in the published version of A6... Without it, you might not even notice the error

EDIT: Woops! Here I am talking about warn_level and just now I noticed I set it to 0!

I'm sorry you will have to set it by sourself

errr wait a moment... Yep here it is: system.wdl, line 419!