# @formula for Lathe.preprocess UndefVarError

**URL:** https://discourse.julialang.org/t/formula-for-lathe-preprocess-undefvarerror/65504
**Category:** Statistics
**Created:** [July 29, 2021, 3:46pm UTC](https://discourse.julialang.org/t/formula-for-lathe-preprocess-undefvarerror/65504 "2021-07-29T15:46:05Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![nilshg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nilshg/32/2283_2.png) [@nilshg](https://discourse.julialang.org/u/nilshg)
#### Post date: [July 29, 2021, 4:25pm UTC](https://discourse.julialang.org/t/formula-for-lathe-preprocess-undefvarerror/65504/4 "2021-07-29T16:25:03Z")

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Okay first of all it’d be good if you had a look at [Please read: make it easier to help you](https://discourse.julialang.org/t/please-read-make-it-easier-to-help-you/14757) to get some tips on how to most effectively ask for help on here - your example isn’t exactly minimal I suppose if your error is related to `@formula`. Also, what is the actual error you’re seeing?

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_[View the full topic](https://discourse.julialang.org/t/formula-for-lathe-preprocess-undefvarerror/65504)._