Error when running brms / wrong PATH?

[Svetlana_Ko]

Can somebody explain to me please in a simple language what path should be in Sys.getenv(‘PATH’) command and how to change it permanently?

I faced the issues with running Bayesian models using package brms on Mac (I downloaded package rstan and fixed C++ compiler and installed Xcode, all that seems to work fine). Here (Error occurred during calling the sampler) I read that PATH should be changed if models with brms are not compiled ( I have the same problem as discussed there) but I don’t understand how it should look like for me. Sys.getenv(‘PATH’) right now gives me directory inside Postgres SQL which I guess is wrong (I worked earlier with postgres database).

Sys.getenv(‘PATH’) [1] “/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/Applications/Postgres.app/Contents/Versions/latest/bin”

[martinmodrak]

Sorry, your question fell through a bit. I am not myself a Mac user myself, but I’ll tag @torkar and @bgoodri. Some important things: I think the instructions differ between R 3.6 and R 4.0, which version of R and RTools are you using?

[torkar]

Sorry, I missed this post completely. @Svetlana_Ko, go to this post:

Dealing with R 4.0

I think I have a more updated one: install.txt (783.5 KB) The main story though - Is the pre-R4.0 instructions should be fine on < 4.0 setups. After R 4.0, Rtools40 should be used on windows, and Xcode (only) should be used on osx. Any previous configurations should be stripped out (in .Rprofile, .Renviron, and R/Makevars{.win}). They can be recreated with optimization options only (and the Rstudio parallel fix for OSX); no need for paths.

and download install.txt, change the name to install.html, and open it in your browser. There you will find step by step instructions for installing rstan on OS X depending on R version.