If your question relates to installation please provide the following information:
- Operating System
- RStan Version
- Output of
writeLines(readLines(file.path(Sys.getenv("HOME"), ".R/Makevars")))
- Output of
devtools::session_info("rstan")
If you are reporting a bug (thank you!) please use the issue tracker (github.com/stan-dev/rstan/issues) instead of the forums.