安装devtools时出现错误：“为‘devtools’加载程序包或命名空间失败”
安装devtools时出现错误：“为‘devtools’加载程序包或命名空间失败”
提问于 2020-02-19 21:57:06
Devtools安装失败。当我运行函数时：
install.packages("devtools")R告诉我包已成功解包。但是当我运行library(devtools)时，我得到了一个错误消息(见下文)。
完整控制台：
`>install.packages("devtools")
Installing package into ‘C:/Users/fallo/OneDrive/Documents/R/win-library/3.6’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.6/devtools_2.2.2.zip'
Content type 'application/zip' length 351954 bytes (343 KB)
downloaded 343 KB
package ‘devtools’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\fallo\AppData\Local\Temp\Rtmp2Ddudk\downloaded_packages
> library(devtools)
Error: package or namespace load failed for ‘devtools’:
.onLoad failed in loadNamespace() for 'pkgload', details:
call: loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]])
error: namespace ‘rlang’ 0.4.0 is already loaded, but >= 0.4.1 is required`> install.packages("devtools")
Installing package into ‘C:/Users/fallo/OneDrive/Documents/R/win-library/3.6’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.6/devtools_2.2.2.zip'
Content type 'application/zip' length 351954 bytes (343 KB)
downloaded 343 KB
package ‘devtools’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\fallo\AppData\Local\Temp\Rtmp2Ddudk\downloaded_packages
> library(devtools)
Error: package or namespace load failed for ‘devtools’:
.onLoad failed in loadNamespace() for 'pkgload', details:
call: loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]])
error: namespace ‘rlang’ 0.4.0 is already loaded, but >= 0.4.1 is required回答 1
Stack Overflow用户
发布于 2020-08-11 16:50:30
我不知道是什么导致了这个特殊的问题，但在我的例子中，它是在我安装Rtools来安装一些包时发生的。最终，它开始在许多包中给出相同的错误。完全删除R并重新安装它解决了我的问题。
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原文链接：
https://stackoverflow.com/questions/60302002
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