Problem installing cmdstanr

[Sayers4697]

I am unable to install cmdstanr. I consistently get the following when I attempt to install. I have tried installing earlier versions and get the same error. I have not seen any help in Stackoverflow or the Stan group.

• installing source package 'cmdstanr' ... using staged installation R inst byte-compile and prepare package for lazy loading help ** installing help indices copying figures building package indices installing vignettes ** testing if installed package can be loaded from temporary location Error: package or namespace load failed for 'cmdstanr': .onLoad failed in loadNamespace() for 'cmdstanr', details: call: if (endsWith(path, "/")) { error: missing value where TRUE/FALSE needed Error: loading failed Execution halted ERROR: loading failed
• removing 'C:/Users/Gary_/AppData/Local/R/win-library/4.2/cmdstanr'
• restoring previous 'C:/Users/Gary_/AppData/Local/R/win-library/4.2/cmdstanr'

[rmcelreath]

This looks like a general Windows package installation bug. Your problem is not specific to cmdstanr (which I did not write). The radical solution is uninstalling your R library completely and starting over. That works for some people. I don't use Windows, so I have no specific advice to offer.