R加载fportfolio包加载不了，麻烦各路大神解答！报错如下：


Error in read.dcf(file.path(pkgname, "DESCRIPTION"), c("Package", "Type")) :
  无法打开链结
此外: Warning messages:
1: In unzip(zipname, exdir = dest) : 从zip文件中抽取1时出了错
2: In read.dcf(file.path(pkgname, "DESCRIPTION"), c("Package", "Type")) :
  无法打开压缩文件'fPortfolio_3011.81.tar.gz/DESCRIPTION'，可能是因为'No such file or directory'
>