# Tire Import fails: Can't update gem due to multi\_json incompatibility

**URL:** <https://discuss.elastic.co/t/tire-import-fails-cant-update-gem-due-to-multi-json-incompatibility/13979>\
**Category:** Elasticsearch\
**Created:** [October 16, 2013, 11:52pm UTC](https://discuss.elastic.co/t/tire-import-fails-cant-update-gem-due-to-multi-json-incompatibility/13979 "2013-10-16T23:52:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Karan\_Verma](https://avatars.discourse-cdn.com/v4/letter/k/858c86/32.png) [@Karan\_Verma](https://discuss.elastic.co/u/Karan_Verma)\
**Post date:** [October 16, 2013, 11:52pm UTC](https://discuss.elastic.co/t/tire-import-fails-cant-update-gem-due-to-multi-json-incompatibility/13979/1 "2013-10-16T23:52:59Z")

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Hi

The tire import taks fails for my model with fails with a uninitialized  
constant error.

bundle exec rake tire:import CLASS="Expert" RAILS\_ENV=staging

tasks.rb:41:in `block in <top (required)>' rake aborted! *uninitialized constant Expert* /shared/bundle/ruby/1.9.1/gems/tire-0.5.3/lib/tire/tasks.rb:42:in`eval'

tasks.rb:42 is:

klass = eval(ENV['CLASS'].to\_s)

I'm unable to update the Tire gem to the latest version.

Bundler could not find compatible versions for gem "multi\_json":  
In Gemfile:  
oa-oauth (= 0.3.2) ruby depends on  
multi\_json (~\> 1.0.0) ruby

```
tire (~> 0.6.1) ruby depends on
  multi_json (1.3.0)

```

Any clues would be very helpful. Thanks.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 2:12am UTC](https://discuss.elastic.co/t/tire-import-fails-cant-update-gem-due-to-multi-json-incompatibility/13979/2 "2017-07-06T02:12:02Z")

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