Packing Cook Failed

When packing, the output log shows me this link text

The thing is that I have tried everything, deleting the materials that where causing the troubles, even deleting folders that where not in use. I have Packaged this Porject before, today I imported the ‘‘Infinity Blade: Grass Lands’’ to the project but I also foreced the delete of this folder in my project since I saw it was recomended in a Post That I saw before. I appreciate all the posible help.

Cheers