# Getting Past the unpack1 error on Heroku

DevFeed: [Getting Past the unpack1 error on Heroku](<https://devfeed.tech/articles/getting-past-the-unpack1-error-on-heroku-28111.md>)

Original publisher: [Read original article](<http://fuzzyblog.io/blog/2019/12/29/getting-past-the-unpack1-error-on-heroku.html>)

Author: Fuzzygroup

Published: 2019-12-29T00:00:00Z

Content type: tutorial

Language: en

Sources: [Scott Johnson](<https://devfeed.tech/sources/scott-johnson.md>)

Topics: [Heroku](<https://devfeed.tech/topics/heroku.md>), [Rails](<https://devfeed.tech/topics/rails.md>), [Ruby](<https://devfeed.tech/topics/ruby.md>), [hosting](<https://devfeed.tech/topics/hosting.md>)

Tags: [config](<https://devfeed.tech/tags/config.md>), [credentials](<https://devfeed.tech/tags/credentials.md>), [git](<https://devfeed.tech/tags/git.md>), [heroku](<https://devfeed.tech/tags/heroku.md>), [hosting](<https://devfeed.tech/tags/hosting.md>), [logs](<https://devfeed.tech/tags/logs.md>), [rails](<https://devfeed.tech/tags/rails.md>), [rake](<https://devfeed.tech/tags/rake.md>)

## AI overview

A troubleshooting article documenting Heroku deployment commands and logs for an encrypted Rails credentials failure. The supplied error reports that the encryption key must be 16 bytes.

## Source excerpt

11373* heroku domains:add okrsnow.com 11374* heroku domains:add www.okrsnow.com 11376* mate _posts/2019-12-29-heroku-and-route-53-using-amazon-for-domain-registration-with-heroku-for-hosting.md 11377* heroku logs 11378* heroku logs -tail 11379* heroku config:set RAILS_MASTER_KEY=123456789abcefg 11380* git push heroku master 11384* git push heroku master 11385* heroku logs -tail 11390* git push heroku master 11391* heroku config:set RAILS_MASTER_KEY=config/credentials/production.yml.enc 11395* git push heroku master 11396* heroku config:set RAILS_MASTER_KEY=f9d510292a72197cb71c44617a6f71690ebe5fde9aaf7c0b19dc0427aeef62e2143e271260e169fd04ab3681f1df173d6079c740f8aeafff491787974809b9aa 11397* git push heroku master 11399* heroku config:set RAILS_MASTER_KEY=65371bc52c911ea14494c5905c07c1cf 11400* git push heroku master 11402 heroku logs tail -f 11404 heroku logs -tail 11409 heroku logs -tail 11411 history | grep heroku 11412 heroku config 11413 bundle exec heroku rake db:migrate 11414 bundle exec heroku rake seed:init https://jumpstartrails.com/discussions/88 remote: /tmp/build_b70efc9d2ecef8d7607b7096a75f9e13/vendor/bundle/ruby/2.6.0/gems/rake-13.0.1/exe/rake:27:in <top (required)>' remote: remote: Caused by: remote: ArgumentError: key must be 16 bytes remote: /tmp/build_b70efc9d2ecef8d7607b7096a75f9e13/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.2.1/lib/active_support/message_encryptor.rb:193:in key=' remote: /tmp/build_b70efc9d2ecef8d7607b7096a75f9e13/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.2.1/lib/active_support/message_encryptor.rb:193:in _decrypt' remote: /tmp/build_b70efc9d2ecef8d7607b7096a75f9e13/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.2.1/lib/active_support/message_encryptor.rb:157:in decrypt_and_verify' remote: /tmp/build_b70efc9d2ecef8d7607b7096a75f9e13/vendor/bundle/ruby/2.6.0/gems/activesupport-6.0.2.1/lib/active_support/messages/rotator.rb:21:in `decrypt_and_verify' remote