Hello,
I get this error after running several models
Error in FUN(X[[i]], trying to get slot "mode" from an object of a basic class ("NULL") with no slots
This has been discussed with Rstan although it is not clear what was the solution here:
The only thing is when I restart R and reopen it I can run the syntax so can it be a memory issue within R?
Any advice is appreciated.
Unfortunately rstan is not very great at those error messages :-(
The most likely cuplrit is that some of the chains didnāt finish correctly. So running on a single core (or just a single chain) is likely to show more info.
Alternatively, you can try switching to using the cmdstanr package instead of Rstan and see if the issue persists (installation instructions: Getting started with CmdStanR ā¢ cmdstanr, then call options(brms.backend = "cmdstanr")
Best of luck with your model!