I have just upgraded R to 4.0.2 (from 3.*). As a result I had to reinstall rstan (and rtools).
As far as I can see, I did nothing unusual or out of the ordinary (after checking here, i installed rstan from source). However now Stan does not work. when I try to run a simple script that previously worked, it says:
G__˜.EXE: error: Model: No such file or directory
twice, then it generates an enormous amount of output (literally 1000s of lines) which may or may not contain error messages, then fails with a pair of error messages roughly as follows:
Fehler in sink(type = “output”) : ungültige Verbindung
[Fehler = Error; ungültige Verbindung = invalid binding/connetion]
Anybody any idea what is going on here, and how to fix it?
Many thanks in advance,