# Cannot run models after updating brms and rstan

**URL:** <https://discourse.mc-stan.org/t/cannot-run-models-after-updating-brms-and-rstan/16591>\
**Category:** brms\
**Created:** [July 14, 2020, 1:44am UTC](https://discourse.mc-stan.org/t/cannot-run-models-after-updating-brms-and-rstan/16591 "2020-07-14T01:44:16Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![julianquandt](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/julianquandt/32/5886_2.png) [@julianquandt](https://discourse.mc-stan.org/u/julianquandt)\
**Post date:** [July 14, 2020, 7:32am UTC](https://discourse.mc-stan.org/t/cannot-run-models-after-updating-brms-and-rstan/16591/4 "2020-07-14T07:32:34Z")

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see [this post](https://discourse.mc-stan.org/t/potential-problems-with-rstan-and-or-brms-packages-in-r-4-0-2/16479/8) for how to use `rstan` 2.19.3 instead, which might fix this problem.

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_[View the full topic](https://discourse.mc-stan.org/t/cannot-run-models-after-updating-brms-and-rstan/16591)._