Strange error: uninitialized constant Barby::Code128A on Heroku server?

I can`t figure out why on heroku server my app crashed. On local server all seems works.

2012-08-01T17:14:50+00:00 app[web.1]: NameError (uninitialized constant Barby::Code128A):
2012-08-01T17:14:50+00:00 app[web.1]:   app/models/order.rb:102:in `generate_shipment'
2012-08-01T17:14:50+00:00 app[web.1]:   app/models/order.rb:60:in `generate_items'
2012-08-01T17:14:50+00:00 app[web.1]:   app/controllers/orders_controller.rb:17:in `create'

I tried to add Procfile, but it not helps me either.

How to debug this?

Hi

I think your model name or controller name misspelled please check first line of your model or controller… that should be correct proper name as you created…