# NoMethodError (undefined method \`unpack1' for #\<String:0x00560ba95dba00\> Did you mean? unpack):

**URL:** <https://www.ruby-forum.com/t/nomethoderror-undefined-method-unpack1-for-string-0x00560ba95dba00-did-you-mean-unpack/264704>\
**Category:** Uncategorized\
**Created:** [March 29, 2024, 8:34am UTC](https://www.ruby-forum.com/t/nomethoderror-undefined-method-unpack1-for-string-0x00560ba95dba00-did-you-mean-unpack/264704 "2024-03-29T08:34:12Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![knb1](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/f6c823/32.png) [@knb1](https://www.ruby-forum.com/u/knb1)\
**Post date:** [March 29, 2024, 8:34am UTC](https://www.ruby-forum.com/t/nomethoderror-undefined-method-unpack1-for-string-0x00560ba95dba00-did-you-mean-unpack/264704/1 "2024-03-29T08:34:12Z")

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For Ruby Version 2.3.4 and rails 5.2 i getting this error. the solution i tried didnt work for me . Any suggestions?

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**Author:** ![jgomo3](https://www.ruby-forum.com/user_avatar/www.ruby-forum.com/jgomo3/32/950_2.png) [@jgomo3](https://www.ruby-forum.com/u/jgomo3)\
**Post date:** [March 31, 2024, 11:01am UTC](https://www.ruby-forum.com/t/nomethoderror-undefined-method-unpack1-for-string-0x00560ba95dba00-did-you-mean-unpack/264704/2 "2024-03-31T11:01:26Z")

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`String#unpack1` is not part of Ruby 2.3.4 API. It only has [unpack](https://ruby-doc.org/core-2.3.4/String.html#method-i-unpack).

`String#unpack1` was added in Ruby 2.4. You can see that in that version’s [NEWS file](https://github.com/ruby/ruby/blob/v2_4_0/NEWS#label-Core+classes+updates+-28outstanding+ones+only-29).

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**Author:** ![ShaunaB1](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/58f4c7/32.png) [@ShaunaB1](https://www.ruby-forum.com/u/ShaunaB1)\
**Post date:** [April 24, 2024, 10:31am UTC](https://www.ruby-forum.com/t/nomethoderror-undefined-method-unpack1-for-string-0x00560ba95dba00-did-you-mean-unpack/264704/3 "2024-04-24T10:31:41Z")

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The error you’re facing is related to the `unpack1` method. It’s not a valid method in Ruby 2.3.4. You might need to update your code or check for compatibility issues with your gems.