cmdstanr cannot find external drive (Windows) #1108
Description
If I use an external drive to store the csv files cmdstanr::sample(..., output_dir = "d:/output") , cmdstanr cannot find the directory.
It appears to mis-read the directory location: I get an error that 'mnt/d/output' does not exist.
[Edit]
This is issue seems specific to R 4.5.1
Everything runs as expected if I use R 4.4.1 (the earlier version of R that I have installed).
To Reproduce
library(cmdstanr) ## version 0.9.0, running with wsl
file <- file.path(cmdstan_path(), "examples/bernoulli/bernoulli.stan")
mod <- cmdstan_model(file)
stan_data <- list(N = 10, y = c(0,1,0,0,0,0,0,0,0,1))
test_dir <- "d:/output"
dir.exists(test_dir)
[1] TRUE
fit_mcmc <- mod$sample(
data = stan_data,
seed = 123,
chains = 2,
parallel_chains = 2,
output_dir = test_dir
)
Error in validate_cmdstan_args(self) :
Assertion on 'self$output_dir' failed: Directory '/mnt/d/output' does not exist.
Operating system
Windows 10 x64, build version 26100
CmdStan 2.36.0 with wsl
R 4.5.1
CmdStanR version number
Your CmdStanR version number (e.g. from packageVersion("cmdstanr")).
This is cmdstanr version 0.9.0
- CmdStan path: //wsl$/ECCC-WSL-UBUNTU-24/home/acsmith/.cmdstan/cmdstan-2.36.0
- CmdStan version: 2.36.0