Trouble installing rlang in R [duplicate] - r

Question

I just upgraded R and R Studio to the most recent versions.
I am trying to load the package RHRV and R Studio aborts the session due to a fatal error. It is associated with the following error:
loading package: tcltk
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
Loading required package: tkrplot
The command:
library("tcltk")
gives the following error message:
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
Warning message:
running command ''/usr/bin/otool' -L '/Library/Frameworks/R.framework/Resources/library/tcltk/libs//tcltk.so'' had status 1
Running the following command crashes R Studio:
library("tkrplot")
Here is some additional information of interest:
sessionInfo("tcltk")
R version 3.2.2 (2015-08-14)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.11 (El Capitan)
locale:
[1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8
attached base packages:
[1] tcltk
loaded via a namespace (and not attached):
[1] Rcpp_0.12.2 Formula_1.2-1 cluster_2.0.3 magrittr_1.5 splines_3.2.2 MASS_7.3-43 grDevices_3.2.2
[8] munsell_0.4.2 colorspace_1.2-6 lattice_0.20-33 minqa_1.2.4 stringr_1.0.0 plyr_1.8.3 tools_3.2.2
[15] utils_3.2.2 nnet_7.3-10 grid_3.2.2 gtable_0.1.2 nlme_3.1-121 latticeExtra_0.6-26 stats_3.2.2
[22] datasets_3.2.2 survival_2.38-3 lme4_1.1-10 digest_0.6.8 base_3.2.2 Matrix_1.2-2 gridExtra_2.0.0
[29] RColorBrewer_1.1-2 nloptr_1.0.4 reshape2_1.4.1 ggplot2_1.0.1 acepack_1.3-3.3 graphics_3.2.2 effects_3.0-4
[36] rpart_4.1-10 stringi_1.0-1 methods_3.2.2 scales_0.3.0 Hmisc_3.17-0 lmerTest_2.0-29 foreign_0.8-65
[43] proto_0.3-10
sessionInfo("tkrplot")
R version 3.2.2 (2015-08-14)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.11 (El Capitan)
locale:
[1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8
attached base packages:
character(0)
other attached packages:
[1] tkrplot_0.0-23
loaded via a namespace (and not attached):
[1] Rcpp_0.12.2 Formula_1.2-1 cluster_2.0.3 magrittr_1.5 splines_3.2.2 MASS_7.3-43 grDevices_3.2.2
[8] munsell_0.4.2 colorspace_1.2-6 lattice_0.20-33 minqa_1.2.4 stringr_1.0.0 plyr_1.8.3 tcltk_3.2.2
[15] tools_3.2.2 utils_3.2.2 nnet_7.3-10 grid_3.2.2 gtable_0.1.2 nlme_3.1-121 latticeExtra_0.6-26
[22] stats_3.2.2 datasets_3.2.2 survival_2.38-3 lme4_1.1-10 digest_0.6.8 base_3.2.2 Matrix_1.2-2
[29] gridExtra_2.0.0 RColorBrewer_1.1-2 nloptr_1.0.4 reshape2_1.4.1 ggplot2_1.0.1 acepack_1.3-3.3 graphics_3.2.2
[36] effects_3.0-4 rpart_4.1-10 stringi_1.0-1 methods_3.2.2 scales_0.3.0 Hmisc_3.17-0 lmerTest_2.0-29
[43] foreign_0.8-65 proto_0.3-10
Matt

Answer 1

With many thanks to Ben, I can provide a solution to the problem. The issue is that El Capitan has a somewhat unknown xcode issue.
Open the Terminal App and enter:
xcode-select --install
It takes a few minutes to load the patch needed to run xcode. The error described above is highlighted in several instances, and this was the workaround.
I then restarted my computer and loaded the package "tkrplot" directly from the source with the code:
install.packages("tkrplot", type="source")
Once I completed these three steps, I was able to load the package "RHRV" and the associated packages "tkrplot" and "tcltk" without issue.

Answer 2

You'll only have the "invalid active developer path" problem when you build package from source. If you use the pre-compiled versions from CRAN, you won't have to worry about it. Try
install.packages("tkrplot", type="binary")