# Rstan not compiling with latest brms with no error message

**URL:** <https://discourse.mc-stan.org/t/rstan-not-compiling-with-latest-brms-with-no-error-message/17698>\
**Category:** Modeling\
**Tags:** performance, rstan\
**Created:** [August 27, 2020, 11:12pm UTC](https://discourse.mc-stan.org/t/rstan-not-compiling-with-latest-brms-with-no-error-message/17698 "2020-08-27T23:12:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dej505](https://avatars.discourse-cdn.com/v4/letter/d/9de053/32.png) [@dej505](https://discourse.mc-stan.org/u/dej505)\
**Post date:** [August 27, 2020, 11:12pm UTC](https://discourse.mc-stan.org/t/rstan-not-compiling-with-latest-brms-with-no-error-message/17698/1 "2020-08-27T23:12:19Z")

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I am trying to run a brms model in r using rstan that used to compile with no problem. I recently updated to the new R and brms but the code stops running after a few seconds with no error and simply returns to the prompt.

Any ideas?

My computer specs are:  
Operating System: Windows 10  
R version 4.0.2  
Rstudio version 1.3.959  
brms version 2.13.3

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**Author:** ![jonah](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/jonah/32/200_2.png) [@jonah](https://discourse.mc-stan.org/u/jonah)\
**Post date:** [August 28, 2020, 12:02am UTC](https://discourse.mc-stan.org/t/rstan-not-compiling-with-latest-brms-with-no-error-message/17698/2 "2020-08-28T00:02:39Z")

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That’s strange there’s no error or anything. This will probably be simpler to figure out with an rstan example that doesn’t use brms. What happens if you try the code below?

```
library(rstan)
example(stan_model, run.dontrun=TRUE, verbose=TRUE)

```