Error building Android app with Xamarin.Forms in debug mode

Hi guys,

I'm getting this error:
/Users/daniel/Projects/Memory/packages/Xamarin.Forms.1.2.3.6257/build/portable-win+net45+wp80+MonoAndroid10+MonoTouch10/Xamarin.Forms.targets: Error: Error executing task XamlG: Multiple document element was detected. Line 6, position 2. (Memory)

Any idea?

Thanks,
Daniel Amorim