facing problem in installing some packages and update of package

Hi, and welcome!

Please see the FAQ: What's a reproducible example (`reprex`) and how do I create one? Using a reprex, complete with representative data will attract quicker and more answers. This question doesn't require one, because it's a self descriptive error message, but please keep this in mind for any coding questions.

The key line in the error message is

namespace ‘rlang’ 0.4.2 is already loaded, but >= 0.4.5 is required

It's telling us that the rlang package version is out-of-date.

The normal result of


is nothing when rlang is up-to-date.


#> R version 3.6.2 (2019-12-12)
#> Platform: x86_64-apple-darwin15.6.0 (64-bit)
#> Running under: macOS Catalina 10.15.3
#> Matrix products: default
#> BLAS:   /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRblas.0.dylib
#> LAPACK: /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRlapack.dylib
#> locale:
#> [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
#> attached base packages:
#> [1] stats     graphics  grDevices utils     datasets  methods   base     
#> loaded via a namespace (and not attached):
#>  [1] compiler_3.6.2  magrittr_1.5    tools_3.6.2     htmltools_0.4.0
#>  [5] yaml_2.2.1      Rcpp_1.0.4      stringi_1.4.6   rmarkdown_2.1  
#>  [9] highr_0.8       knitr_1.28      stringr_1.4.0   xfun_0.12      
#> [13] digest_0.6.25   rlang_0.4.5     evaluate_0.14

Created on 2020-03-18 by the reprex package (v0.3.0)
shows the current versions of packages in the installation.

What I'd suggest is


from the console pane, quitting, restarting, then


Under loaded via a namespace (and not attached):

you should now see rlang_0.4.5