Rtools not being detected by R

add rtools to system path
error 127 rtools
r tools online
rtools 3.3 0
c:/rtools/mingw_32/bin/gcc no such file or directory
rtools description
update version of rtools
rtools c compiler

Update:

I've written a brief walkthrough guide to installing Rtools on windows.

Original:

I am trying to build an R package using RStudio on Windows 7. When I attempt to build the package via RStudio's Build panel I receive:

WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

http://cran.rstudio.com/bin/windows/Rtools/

Loading library(devtools) and running find_rtools(T) gives:

Scanning path...
ls : F:\Rtools\bin\ls.exe 
Scanning registry...
Found F:/Rtools for 3.1 
VERSION.txt
Rtools version 3.1.0.1936 
[1] TRUE

The Path variable is set as:

F:\Rtools\bin;F:\Rtools\gcc-4.6.3\bin;F:\Rtools\perl\bin;F:\Rtools\MinGW\bin;F:\Program Files\R\R-3.0.2\bin\x64;F:\Program Files (x86)\HTML Help Workshop;F:\Program Files\MiKTeX 2.9\miktex\bin\x64\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files\Microsoft Network Monitor 3\;F:\Program Files (x86)\QuickTime\QTSystem\

I've also restarted several times, yet the error persists. I'm a bit confused as to why this is occurring.

Output when R access system variable Path:

> Sys.getenv()['PATH']
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 PATH 
"F:\\Program Files\\R\\R-3.0.2\\bin\\x64;F:\\Rtools\\bin;F:\\Rtools\\gcc-4.6.3\\bin;F:\\Rtools\\perl\\bin;F:\\Rtools\\MinGW\\bin;F:\\Program Files\\R\\R-3.0.2\\bin\\x64;F:\\Program Files (x86)\\HTML Help Workshop;F:\\Program Files\\MiKTeX 2.9\\miktex\\bin\\x64\\;C:\\Program Files (x86)\\NVIDIA Corporation\\PhysX\\Common;C:\\Program Files\\Common Files\\Microsoft Shared\\Windows Live;C:\\Program Files (x86)\\Common Files\\Microsoft Shared\\Windows Live;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\Windows Live\\Shared;C:\\Program Files\\Microsoft Network Monitor 3\\;F:\\Program Files (x86)\\QuickTime\\QTSystem\\" 

The R version I am using is: R version 3.0.2 (2013-09-25) -- "Frisbee Sailing."

The Rstudio Version I am using is: 0.97.551. When I check for updates, I'm told that this is the latest patch.

> Sys.which("ls.exe")
                   ls.exe 
"F:\\Rtools\\bin\\ls.exe" 
> Sys.which("gcc.exe")
gcc.exe 
     "" 

Turns out when I installed RTools I left out the R 2.15.x+ toolchain option in the installation, which lead to the gcc never being installed. Hopefully, this post will serve as a diagnostic guide if RStudio fails to register RTools.

Thank you everyone for your help.

Rtools is not being detected from RStudio, Via R CMD check not looking for gcc in Rtools directory: with BINPREF = , but as the Makeconf file is overwritten when R is updated, you'll have to remember to do this each time. It sounds like devtools is finding it but RStudio is not, so you can use the devtools functions (e.g. build) instead. You don't say which version of Rstudio you're using - make sure you have the latest version, and if it still doesn't work report the bug at support.rstudio.org – hadley Nov 10 '13 at 7:34.

The RTools install on Windows doesn't select the C compiler to include by default. I ran the install a few times blindly clicking through and got this error. I reran the installer and selected/included the 32bit and 64bit C compilers. Problem solved.

Rtools not recognized on Win 10, R 3.6.1, RStudio 1.2.5001 , Nothing worked. As far as I can tell, the problem seems to be coming from the cpp​.exe not being found or cannot be used. Here are the  I have a comprehensive answer here for rtools not being recognized thru use of pkgbuild `devtools::install_github(repo)` keeps installing rtools35.exe. The code snippet acknowledges the github comment this is posted (helped by r-sig-finance citizens)

It may as well be added that if you don't have admin rights on your computer the installation of Rtools will fail due to some missing registry permissions.

Took me quite some time to figure that out because if you install Rtools via R you won't see this alert.

So better download the .exe-file, install it as admin and tick the boxes mentioned above to get Rtools working properly.

RStudio cannot find Rtools - RStudio IDE, This question is similar to: https://community.rstudio.com/t/rtools-not-recognized-​on-win-10-r-3-6-1-rstudio-1-2-5001/43415, but I couldn't find a  To check versions if Rtools is in C:\Rtools then from within R file.show("C:/Rtools/version.txt") will show its version and typing R.version.string will show the R version. the table at the web site cran.r-project.org/bin/windows/Rtools will show what version of Rtools you need for a given R version. Also again assuming Rtools is at C:\Rtools check if C:\Rtools\bin, C:\Rtools\mingw_32\bin and C:\Rtools\mingw_64\bin are on your Windows PATH.

I had the same error, and I had installed the tool chain (I believe).

My fix was to move the R Tools paths to the front of my PATH variable.

The why and the how of installing Rtools, Found C:/Rtools for 3.5 #> WARNING: Rtools is required to build R packages, but no version of Rtools compatible with R 3.5.1 was found. I try installing a new author account repository from 'author/newrepo'and keep getting R wants to install new buildtoools message. Then the installation exits. Rtools35.exe installation has already been completed. I am using older version of R (3.5.0) currentlyy because RTools is not available for the 3.5.1 update

Another possible cause is for R to be looking in the wrong directory for RTools components, via R CMD check not looking for gcc in Rtools directory:

R uses a BINPREF variable to locate certain executables, including components of RTools.

BINPREF can be set in a number of places. In my case, it was set in C:/Users/MYUSERNAME/Documents/.R/Makevars. Deleting the contents of this file removed a link to a previous, and since deleted, installation of RTools.

It is also worth checking the file $RPATH/etc/i386/Makeconf (swap i386 for x64 if you have a 64-bit installation), which will be re-created with each new installation of R. Note the line BINPREF ?= c:/Rtools/mingw_32/bin/, which (via the ?= operator) will set the value of BINPREF if it is not already set, as it was in the Makevars file mentioned above.

A temporary fix is to replace BINPREF ?= with BINPREF =, but as the Makeconf file is overwritten when R is updated, you'll have to remember to do this each time. Better to edit, or delete, the Makevars file for a permanent change.

has_rtools: Is Rtools installed? in pkgbuild: Find Tools Needed to , WARNING: Rtools is required to build R packages but is not currently installed. I tried setting the path as suggested as a previous fix (Sys.setenv(  on windows R expect Rtools to be in c:\rtools and does not check the PATH by default. It is define in the source I think. This is the default for R, but RStudio updates the PATH as needed whenever we're about to take an action that will invoke Rtools..rs.installBuildTools offers to download a binary different from the one in CRAN

Rtools not recognized (R3.5.1, Rtools 3.5), on windows R expect Rtools to be in c:\rtools and does not check the is since RStudio uses that to detect if Rtools is already on the PATH:. find_rtools() does not find Rtools with message "C:/Rtools has been deleted #294

Rtools not found after R 4.0.0 installation - General, WARNING: Rtools is required to build R packages, but no version of Rtools compatible with R 3.5.0 was found. (Only the following incompatible  Allows the user to choose, downloads and install - the latest version of Rtools for Windows. By default, the function searches if RTools is installed, if not, it checks if it knows which version to isntall for the current R version, and if not - it asks the user to choose which Rtools version to install.

RStudio do not find Rtools and offer to install even if already , Am using windows 10, and have the latest version of R and Rstudio and Rtools not detected by rstudio Is there a solution to this problem? Hi, I have been developing a personal package for a while on Win 7 Enterprise, Service Pack 1, with RStudio 1.2.5001 and R 3.6.1. In this system all needed to do is to download Rtools from CRAn and run the exe and install Rtools under C (C:\\Rtools). After that, from RStudio project environment when I clicked Build > Install and Restart, everything worked fine. Recently I moved to Win 10

Comments
  • Check Sys.getenv()['PATH'] to see if that's the path in R, too.
  • I get the same path only with \\ vs. the single \ in PATH environment. The path output contains the same above. I would post it, but the comment limits my character count.
  • It sounds like devtools is finding it but RStudio is not, so you can use the devtools functions (e.g. build) instead. You don't say which version of Rstudio you're using - make sure you have the latest version, and if it still doesn't work report the bug at support.rstudio.org
  • What output do you see for Sys.which("ls.exe") and Sys.which("gcc.exe")? RStudio expects both of those to be on the path, and inside the Rtools directory.
  • > Sys.which("ls.exe") ls.exe "F:\\Rtools\\bin\\ls.exe" > Sys.which("gcc.exe") gcc.exe "" So, it looks like gcc isn't being found?
  • For another possible solution for this error message see: stackoverflow.com/a/37738504/4468078
  • Please don't do these kinds of redirects to another question that redirects to yet another question. The issue you supply is relating to RStudio not detecting Rtools on a custom path. This is a bug that has been fixed depending on the RStudio version.
  • How would someone check if they installed the toolchain or not? Perhaps Sys.which("gcc.exe")?
  • @geneorama the toolchain will be located at C:\Rtools under a default install. Alternative, in R, try Sys.getenv('PATH'). If running into issues, try moving the location in PATH to the top.
  • @coatless wow, thanks for the immediate response. I found the fix (moving RTools up in my path) and added the answer already.
  • I had to add C:\rtools40\usr\bin to PATH on windows
  • @SahilSingh just updated my R to 4.0, and the rtools path seems to have changed from Rtools/bin to rtools40/usr/bin
  • writeLines('PATH="${RTOOLS40_HOME}\\usr\\bin;${PATH}"', con = "~/.Renviron")
  • One should also restart R after that test with Sys.which("make")