Error when running {brms} tutorial model code in R 4.3.1

Interfaces brms
,
1

Hi

I am running Stan models through brms on a computing cluster.
After a recent rebuild of the cluster management system, I encountered a problem in running brms code to fit models. The code has worked previously.

I am working in R 4.3.1. Loading ‘brms’ package (version 2.21.0).

To try to locate the problem, I ran the tutorial model code – from here:

fit1 <- brm(count ~ zAge + zBase * Trt + (1|patient),
            data = epilepsy, family = poisson())

The result is:

Error in stanc(file = file, model_code = model_code, model_name = model_name,  : 
  0
Semantic error in 'string', line 5, column 12 to column 13:
   -------------------------------------------------
     3:  }
     4:  data {
     5:    int<lower=1> N;  // total number of observations
                     ^
     6:    array[N] int Y;  // response variable
     7:    int<lower=1> K;  // number of population-level effects
   -------------------------------------------------

Integer literal cannot be larger than 2_147_483_647.

This error message is the same as the message I get running my own model code on the cluster.

I haven’t run brms on my own computer (old version of R and of brms which works fine).

Any advice on what the problem may be would be much appreciated.