# Updating Old Julia Code - Cant get past ArgumentError: Invalid Index

**URL:** <https://discourse.julialang.org/t/updating-old-julia-code-cant-get-past-argumenterror-invalid-index/59894>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [April 23, 2021, 7:28pm UTC](https://discourse.julialang.org/t/updating-old-julia-code-cant-get-past-argumenterror-invalid-index/59894 "2021-04-23T19:28:09Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![rdeits](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rdeits/32/286_2.png) [@rdeits](https://discourse.julialang.org/u/rdeits)\
**Post date:** [April 23, 2021, 7:53pm UTC](https://discourse.julialang.org/t/updating-old-julia-code-cant-get-past-argumenterror-invalid-index/59894/5 "2021-04-23T19:53:11Z")

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Yeah, there’s an easy way to post formatted code described here: [Please read: make it easier to help you](https://discourse.julialang.org/t/psa-make-it-easier-to-help-you/14757) but the key is to first do the work to find the _minimal_ set of code that reproduces the problem you want to solve.

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