# Draw attention to issue "unknown firstpos: NilClass" in Rails 5.1

**URL:** <https://metaruby.com/t/draw-attention-to-issue-unknown-firstpos-nilclass-in-rails-5-1/1199>\
**Category:** Rails Forum\
**Created:** [August 22, 2017, 1:05pm UTC](https://metaruby.com/t/draw-attention-to-issue-unknown-firstpos-nilclass-in-rails-5-1/1199 "2017-08-22T13:05:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Evmorov](https://metaruby.com/user_avatar/metaruby.com/evmorov/32/879_2.png) [@Evmorov](https://metaruby.com/u/Evmorov)\
**Post date:** [August 22, 2017, 1:05pm UTC](https://metaruby.com/t/draw-attention-to-issue-unknown-firstpos-nilclass-in-rails-5-1/1199/1 "2017-08-22T13:05:10Z")

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The problem is described [here](https://stackoverflow.com/questions/44465118/rails-5-1-unknown-firstpos-nilclass-issue-reloading-application). Maybe someone has solved the problem and want to share the solution?