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I got this error just after installing devise 3.4.0 gem in my application. When I input rails s in terminal, I get the error below..

[kmartin@localhost register]$ rails s
=> Booting WEBrick
=> Rails 4.2.1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
bin/rails:6: warning: already initialized constant APP_PATH
/home/kmartin/work/register/bin/rails:6: warning: previous definition of APP_PATH was here
Usage: rails COMMAND [ARGS]

The most common rails commands are:
 generate    Generate new code (short-cut alias: "g")
 console     Start the Rails console (short-cut alias: "c")
 server      Start the Rails server (short-cut alias: "s")
 dbconsole   Start a console for the database specified in config/database.yml
             (short-cut alias: "db")
 new         Create a new Rails application. "rails new my_app" creates a
             new application called MyApp in "./my_app"

In addition to those, there are:
 destroy      Undo code generated with "generate" (short-cut alias: "d")
 plugin new   Generates skeleton for developing a Rails plugin
 runner       Run a piece of code in the application environment (short-cut alias: "r")

All commands can be run with -h (or --help) for more information.
Arslan Ali
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user4737150
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  • possible duplicate of [rails server bin/rails:6: warning: already initialized constant APP\_PATH error](http://stackoverflow.com/questions/23402820/rails-server-bin-rails6-warning-already-initialized-constant-app-path-error) – shivam Apr 20 '15 at 06:44
  • @shivam i have checked that link and seems all solutions there dont work for for my error cant figure out why – user4737150 Apr 20 '15 at 06:48
  • what does `rake rails:update:bin` returns? – shivam Apr 20 '15 at 06:51
  • @shivam it overwrites the previous bin/rails file and when i run rails s its give me error of uninitialised constant Mart..Mart is my devise user i created...[kmartin@localhost register]$ rake rails:update:bin exist bin identical bin/bundle conflict bin/rails Overwrite /home/kmartin/work/register/bin/rails? (enter "h" for help) [Ynaqdh] Y force bin/rails identical bin/rake identical bin/setup – user4737150 Apr 20 '15 at 06:56
  • Try running `rails c` - you should get a more explicit error – Frederick Cheung Apr 20 '15 at 07:11

1 Answers1

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I actually just changed my devise gem from 3.1. to just gem 'devise' then bundle installed and my problem was solved...It seems the version of devise wasnt supported by rails 4.

user4737150
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