如题,使用insatll.packages("cluster")安装包时,会出现如下错误提示. Warning: unable to access index for repository https://mirror.lzu.edu.cn/CRAN/src/contrib: cannot open URL 'https://mirror.lzu.edu.cn/CRAN/src/contrib/PACKAGES'Warning: unable to access index for r
最近在卸载VirtualBox出现了无法卸载的错误.提示为Failed to install the extension. The installer failed with exit code 1: VBoxExtPackHelperApp.exe: error: Failed to rename the extension pack directory: VERR_ALREADY_EXISTS. 而且也无法再次成功安装.本文是对此给出的描述及其解决办法. 1.故障描述 环境:Windows
文章出处:http://blog.csdn.net/leshami/article/details/9232229 最近在卸载VirtualBox出现了无法卸载的错误.提示为Failed to install the extension. The installer failed with exit code 1: VBoxExtPackHelperApp.exe: error: Failed to rename the extension pack directory: VERR_ALREAD