# New error: cleanup\_makevar(old) : argument "RMU" is missing, with no default

**URL:** <https://discourse.mc-stan.org/t/new-error-cleanup-makevar-old-argument-rmu-is-missing-with-no-default/18137>\
**Category:** RStan\
**Tags:** windows, bug, compiler, rstan\
**Created:** [September 22, 2020, 7:24pm UTC](https://discourse.mc-stan.org/t/new-error-cleanup-makevar-old-argument-rmu-is-missing-with-no-default/18137 "2020-09-22T19:24:18Z")\
**Posts on this page:** 1\
**Showing post:** 25

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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:** [September 29, 2020, 12:02am UTC](https://discourse.mc-stan.org/t/new-error-cleanup-makevar-old-argument-rmu-is-missing-with-no-default/18137/25 "2020-09-29T00:02:26Z")

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> [@stevebronder](#):
>
> I’m testing this locally now and the version on github is working for 2.3.0 on my ubuntu machine

@stevebronder I have no idea why but my guess is this is a Windows thing since you can’t reproduce it on ubuntu and I can’t on my mac. It seems like everyone reporting this is on Windows.

@bgoodri I know you said you were working on an RStan submission, so tagging you in case you haven’t seen this error that a lot of people are getting.

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