# Expose\_stan\_functions not working after updating rstan and R

**URL:** <https://discourse.mc-stan.org/t/expose-stan-functions-not-working-after-updating-rstan-and-r/25569>\
**Category:** RStan\
**Tags:** rstan\
**Created:** [December 4, 2021, 5:09am UTC](https://discourse.mc-stan.org/t/expose-stan-functions-not-working-after-updating-rstan-and-r/25569 "2021-12-04T05:09:32Z")\
**Posts on this page:** 1\
**Page:** 2

<div class="post-metadata">

**Author:** ![hsbadr](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/hsbadr/32/15069_2.png) [@hsbadr](https://discourse.mc-stan.org/u/hsbadr)\
**Post date:** [March 7, 2022, 1:20pm UTC](https://discourse.mc-stan.org/t/expose-stan-functions-not-working-after-updating-rstan-and-r/25569/21 "2022-03-07T13:20:25Z")

</div>

Can you test v2.26.7?

```r
remove.packages(c("rstan", "StanHeaders"))
install.packages("StanHeaders", repos = c("https://mc-stan.org/r-packages/", getOption("repos")))
install.packages("rstan", repos = c("https://mc-stan.org/r-packages/", getOption("repos")))

```

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