执行Nationstech.N32G45x_DFP.1.0.6.pack时候，弹出错误对话框，内容如下：

E: bad pack name: it should be one of the following formats: Vendor.Pack, Vendor.Pack.x.y.z, Vendor.Pack.x.y.z.pack, or Vendor.Pack.pdsc
E: File "Kit\Nationstech.N32G45x_DFP.1.0.6.pack" doesn't exist
E: file not found

----怎么解决？keil是最新版本的，官方网站下载的。