Help ! error when installing the source package ‘lme4’

[Alicejenny]

Rstudio version: RStudio-1.3.1093
R version：R-3.6.3
lme4 package version: lme4_1.1-27.1
Dear friends, When I install the Lme4 package using Rstudio, an error occurs. The detailed error information is as follows，I would be grateful if you could give me some advice or solutions
ERROR: dependency 'Rcpp' is not available for package 'lme4'

• removing 'D:/Program Files (x86)/R-3.6.3/library/lme4'
  Warning in install.packages :
  installation of package ‘lme4’ had non-zero exit status
  The downloaded source packages are in
  ‘C:\Users\h-p\AppData\Local\Temp\RtmpuYumiQ\downloaded_packages’

[andresrcs]

@Alicejenny

ERROR: dependency 'Rcpp' is not available for package 'lme4'

I'm not sure if this is the only problem, since you are not posting the complete output message but, at least this part is telling you that you are missing a package dependency, try installing it first and if you get a new error message, post it here.

install.packages("Rcpp")

[Alicejenny]

When I installed “Rcpp”, a new error appeared, as detailed below:

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

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

  There is a binary version available but the source version is later:
     binary source needs_compilation
Rcpp  1.0.6  1.0.7              TRUE

installing the source package ‘Rcpp’

试开URL’https://cran.rstudio.com/src/contrib/Rcpp_1.0.7.tar.gz'
Content type 'application/x-gzip' length 2941808 bytes (2.8 MB)
downloaded 2.8 MB

* installing *source* package 'Rcpp' ...
** 成功将'Rcpp'程序包解包并MD5和检查
** using staged installation
** libs

*** arch - i386
c:/Rtools/mingw_32/bin/g++ -std=gnu++11  -I"D:/Program Files (x86)/R-3.6.3/include" -DNDEBUG -I../inst/include/         -O2 -Wall  -mtune=core2 -c api.cpp -o api.o
sh: line 1: c:/Rtools/mingw_32/bin/g++: No such file or directory
make: *** [D:/Program Files (x86)/R-3.6.3/etc/i386/Makeconf:215: api.o] Error 127
ERROR: compilation failed for package 'Rcpp'
* removing 'D:/Program Files (x86)/R-3.6.3/library/Rcpp'
Warning in install.packages :
  installation of package ‘Rcpp’ had non-zero exit status

The downloaded source packages are in
	‘C:\Users\h-p\AppData\Local\Temp\RtmpMzmtM8\downloaded_packages’

[andresrcs]

You need to have RTools installed in your system for compiling packages from source, you can download a matching version of RTools (for your old R version) from here

https://cran.r-project.org/bin/windows/Rtools/history.html

[Alicejenny]

Ok, I will try as you say, thank you for taking the time to answer, very grateful for your help, best wishes to you ~

[EconProf]

Did you try replying No to installing Rcpp 1.0.7 from source? The 1.0.6 binary should work fine for lme4.

[Alicejenny]

Thanks very much for your advice， and I installed a matching RTools in my system. The problem has been solved.