Albert @avazquez, I’m wondering if you’ve tried building the gem wars sample project, and whether or not you are seeing the same error with it.
If you do see the same error with it, then I’m not sure why (because when I built it, I didn’t see the type of error you are describing.)
If you don’t see the same error, then you might want to investigate the difference between your code and the sample code and track down where it may be causing the issue for you.
Naomi