【发布时间】：2019-09-29 01:03:44
【问题描述】：
这没什么大不了的；一切似乎都正常，但每次在 Windows 10 上启动 R 时都会收到一条消息，这让我感到困扰：
C:\devl\temp>R
**The system cannot find the path specified.**
R version 3.6.1 (2019-07-05) -- "Action of the Toes"
Copyright (C) 2019 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)
我重新安装了它，更改了 Rprofile.site 中的路径，弄乱了我的路径。我可以直接运行 R 可执行文件：
C:\R\R-3.6.1\bin>.\x64\R.exe
The system cannot find the path specified.
仍然会收到消息。
无论如何，我只是想更好地了解 R 的启动顺序，所以我很感激任何关于在哪里寻找 R 试图在启动时打开的路径的建议。
更新
@Pepv 的链接将我带到了启动包的 startup(debug=TRUE) 函数。在做了一些清理之后，下面是完整的输出。答案现在肯定是盯着我的脸。
C:\Users>R
The system cannot find the path specified.
R version 3.6.1 (2019-07-05) -- "Action of the Toes"
Copyright (C) 2019 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64 (64-bit)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
Natural language support but running in an English locale
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
[1] "I'm the Rprofile.site in the R installation directory!"
[1] "I am the .Rprofile in C:/devl"
> startup::startup(debug = TRUE)
0.001s: System information:
0.007s: - R_HOME: 'C:/R/R-3.6.1' (existing folder)
0.012s: - R call: C:\R\R-3.6.1/bin/x64/Rterm.exe
0.017s: - Current directory: 'C:/Users'
0.022s: - User's home directory: '~' => 'C:\devl' (existing folder)
0.028s: - Search path: '.GlobalEnv', 'package:stats', 'package:graphics', 'package:grDevices', 'package:utils', 'package:datasets', 'package:methods', 'Autoloads', 'package:base'
0.044s: - Loaded namespaces: 'compiler', 'startup', 'graphics', 'utils', 'grDevices', 'stats', 'datasets', 'methods', 'base'
0.055s: The following has already been processed by R:
0.061s: - R_ENVIRON: ''
0.063s: - R_ENVIRON_USER: ''
0.068s: - R_DEFAULT_PACKAGES: '' (= 'base,methods,datasets,utils,grDevices,graphics,stats')
0.078s: - R_LIBS: 'C:\devl\Rpackages'
0.083s: - R_LIBS_SITE: ''
0.086s: - R_LIBS_USER: 'C:\devl\Rpackages'
0.090s: - R_PROFILE: ''
0.095s: - R_PROFILE_USER: 'C:\devl\.Rprofile' (1 lines; 42 bytes)
0.105s: - 'C:/R/R-3.6.1/etc/Rprofile.site' (2 code lines; 619 bytes)
0.117s: - 'C:\devl\.Rprofile' (1 code lines; 42 bytes)
0.124s: startup::startup()-specific processing ...
0.130s: Found startup directory '~/.Renviron.d'.
0.145s: Processing 1 Renviron files ...
0.153s: - 'C:\devl/.Renviron.d/.Renviron' (0 lines; 0 bytes) setting 0 environment variables
0.164s: Processing 1 Renviron files ... done
0.177s: Found startup directory 'C:\devl\.Rprofile.d'.
0.188s: Processing 1 Rprofile files ...
0.196s: - 'C:\devl\.Rprofile.d/.Rprofile' (1 code lines; 30 bytes)
[1] "I am in .Rprofile.d"
0.208s: Processing 1 Rprofile files ... done
0.216s: - unloading the 'startup' package
0.222s: - Search path: '.GlobalEnv', 'package:stats', 'package:graphics', 'package:grDevices', 'package:utils', 'package:datasets', 'package:methods', 'Autoloads', 'package:base'
0.238s: - Loaded namespaces: 'compiler', 'graphics', 'utils', 'grDevices', 'stats', 'datasets', 'methods', 'base'
0.250s: startup::startup()-specific processing ... done
0.257s: The following will be processed next by R:
0.262s: - R_HISTFILE: ''
0.274s: - .First(): no such function on search()
0.279s: - Remaining packages per R_DEFAULT_PACKAGES to be attached by base::.First.sys() (in order):
更新 2 或者可能不是。 Rterm.exe 不会触发该消息，并且根据this source，“R（与 Rterm 相对）是一个小型 .exe 程序，它的作用很小 参数解析，然后运行 Rterm。”甚至 R.exe --help 都会触发消息，因此这必须与实际的 R.exe 参数解析有关。接近关闭此问题。
【问题讨论】：
-
尝试在 .Rprofile 文件的开头和结尾放置
cat语句以尝试缩小范围。同样从 Windows cmd 行输入set R以显示可能与 R 关联的任何环境变量。 -
好主意。我在其中添加了一些额外的 cat 语句，我可以看到很多关于 startup::startup(debug=TRUE) 的情况。鉴于 R.exe --version, 显示消息，它似乎必须是 R.exe 的中心。