Rstan fails after computer crash (missing libc++abi.1.dylib)

[torkar]

And I now see that you have already done that :)

R 4.0, rstan, and you

R 4.0 has released, and you are wanting to use rstan. Your models no longer run, you are getting cryptic error messages, and want to post here about it. With R4.0, and the latest compiler configuration, you must configure rstan differently. Configurations from previous versions are breaking under R 4.0. Try these things first, as they generally solve any problems I have seen others report, and problems I have observed under OSX Mojave, Catalina, and Windows 10. Summary R 4.0 does not require m…