# In seq(from=created, by = "month", length.out = 12) from- error

**URL:** <https://community.exploratory.io/t/in-seq-from-created-by-month-length-out-12-from-error/2141>\
**Category:** Issues\
**Created:** [February 16, 2022, 10:26am UTC](https://community.exploratory.io/t/in-seq-from-created-by-month-length-out-12-from-error/2141 "2022-02-16T10:26:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Kate\_L](https://community.exploratory.io/letter_avatar_proxy/v4/letter/k/6de8d8/32.png) [@Kate\_L](https://community.exploratory.io/u/Kate_L)\
**Post date:** [February 16, 2022, 10:26am UTC](https://community.exploratory.io/t/in-seq-from-created-by-month-length-out-12-from-error/2141/1 "2022-02-16T10:26:20Z")

</div>

Hi dear community.  
I’m trying to analyse our MRR from Srtipe following this[amazing article](https://blog.exploratory.io/analyzing-mrr-monthly-recurring-revenue-using-stripe-data-in-r-and-exploratory-ea434d4aed6).

Now trying to convert year in month, the mutate() step returns **‘8. Custom R Command’ step has an error. Error : Problem with `mutate()` column `recurring_month`. ℹ `recurring_month = list(seq(from = created, by = "month", length.out = 12))`. ✖ ‘from’ must be of length 1 ℹ The error occurred in group 1: customer\_id = “cus\_FOlMdeHUzEUL3b”**.

Does anyone have similar issues?  
Looking very much to your replies. Thank you beforehand \<3