Rstan incosistently running

[bgoodri]

That is a RStudio bug

R 4.0.0 and CRAN MacOS binaries

I also was having issues with multiple chains running in parallel in MacOS using latest R-4.0.0 and RStan. I’ve found out that this is a problem of the package parallel from R-4.0.0 I’ve found this recently issue in RStudio’s GitHub that solved my problem: cl <- parallel::makeCluster(2, setup_strategy = "sequential") If this works, you could add the following to your ~/.Rprofile until this is fixed in R/RStudio: ## WORKAROUND: https://github.com/rstudio/rstudio/issues/6692 ## Revert to 'se…