I was playing with Couchbase and plain Ruby in my Terminal. Then I got the error message: invalid multibyte char (US-ASCII) or Message from application: /www/pro_edgudri_lv/app/models/plans_modification.rb:7: invalid multibyte char (US-ASCII) /www/pro_edgudri_lv/app/models/plans_modification.rb:7: invalid multibyte char (US-ASCII) /www/pro_edgudri_lv/app/models/plans_modification.rb:7: syntax error, unexpected $end, expecting keyword_end ..._change, :message => "nevar būt tukšs" ... ^ (SyntaxError) If you got this error, you know that this is a result of having special chars. To fix this, you have to add a ‘magic comment’ in the script. Here is a step-by-step instruction how to solve this problem: 1. Open your file 2. go to the VERY FIRST line of your code 3. write the following at the top of your file #!/bin/env ruby # encoding: utf-8 Example :- payment_controller.rb:- # encoding: utf-8 class PaymentsCont