issue when calling executable in a path that has space

问题

I just installed R on a new Microsoft Windows 7 computer and I am running in the following error when using command line:

"C:\Program Files\R\R-3.3.2\bin\Rscript.exe" --version  
'C:\Program' is not recognized as an internal or external command,

operable program or batch file.

Note that I have added above the quotes around the path with a space. And that I have added in the system path:

;C:\Program Files\R\R-3.3.2\bin\

Interestingly:

if I just call this Rscript.exe --version it gives the same error, which is very weird: if it finds it, why can't it run it!?! The only explanation I can find is that the error occurs when looking for a dependency of Rscript.exe
I also noticed that this works "C:\Program Files\R\R-3.3.3\bin\x64\Rscript.exe" --version (both folders ...\bin and ...\bin\x64 have an executable Rscript.exe)

Finally I confirm it is an R specific question as all other executables I tried in a subfolder of Program Files can be called through the same command line interface!

回答1:

I have been trying to replicate your issue and I found one thing in your question: You mention that this does not work:

"C:\Program Files\R\R-3.3.2\bin\Rscript.exe" --version  
'C:\Program' is not recognized as an internal or external command,

But this does:

"C:\Program Files\R\R-3.3.3\bin\x64\Rscript.exe" --version

It seems that you are using R-3.3.3 in the example that works and R-3.3.2 in the example that does not.

So I would assume that if you change it to

"C:\Program Files\R\R-3.3.3\bin\Rscript.exe" --version

it should work.

回答2:

Check out

C:\Users>Rscript --help
Usage: /path/to/Rscript [--options] [-e expr [-e expr2 ...] | file] [args]

--options accepted are
  --help              Print usage and exit
  --version           Print version and exit
  --verbose           Print information on progress
  --default-packages=list
                      Where 'list' is a comma-separated set
                        of package names, or 'NULL'
or options to R, in addition to --slave --no-restore, such as
  --save              Do save workspace at the end of the session
  --no-environ        Don't read the site and user environment files
  --no-site-file      Don't read the site-wide Rprofile
  --no-init-file      Don't read the user R profile
  --restore           Do restore previously saved objects at startup
  --vanilla           Combine --no-save, --no-restore, --no-site-file
                        --no-init-file and --no-environ

'file' may contain spaces but not shell metacharacters
Expressions (one or more '-e <expr>') may be used *instead* of 'file'
See also  ?Rscript  from within R

Pursuing your theory that some dependency is at fault, I hoped that --verbose would indicate what other files Rscript tries to read. No such luck.

Incidentally, almost none of these options are usable for me unless I provide Rscript with some commands as well -- otherwise it keeps complaining "file name is missing". So with any of these possibilities, you can go with something like

C:\Users>Rscript --verbose -e print(2+2)

That being said, you might further pursue your theory by using the options like --no-environ, --no-site-file, --vanilla, etc., to make it skip any file dependencies and see if it gets you somewhere.

来源：https://stackoverflow.com/questions/46727058/issue-when-calling-executable-in-a-path-that-has-space

标签

path

environment-variables

command-line-interface