Bad File Descriptor - Heroku Foreman

Question

I'm trying to run hello.py from this Python Heroku tutorial. My problems began after running this command: foreman start. I got the following error even though I installed the Heroku Toolbelt:

foreman is not recognized as an internal or external command, operable program or batch file

So I added the location of the foreman file (version 0.63.0) to my path:

C:\Program Files (x86)\Heroku\ruby-1.9.2\bin

and restarted the command prompt and reran foreman start. Now, I'm getting this error:

Microsoft Windows [Version 6.2.9200]
(c) 2012 Microsoft Corporation. All rights reserved.

C:\Users\me\Desktop\Code\heroku_python_app>venv\Scripts\activate
(venv) C:\Users\me\Desktop\Code\heroku_python_app>foreman start
Bad file descriptor
C:/Program Files (x86)/Heroku/ruby-1.9.2/lib/ruby/gems/1.9.1/gems/foreman-0.63.0
/lib/foreman/engine.rb:372:in `read_nonblock'
C:/Program Files (x86)/Heroku/ruby-1.9.2/lib/ruby/gems/1.9.1/gems/foreman-0.63.0
/lib/foreman/engine.rb:372:in `block (2 levels) in watch_for_output'
C:/Program Files (x86)/Heroku/ruby-1.9.2/lib/ruby/gems/1.9.1/gems/foreman-0.63.0
/lib/foreman/engine.rb:368:in `loop'
C:/Program Files (x86)/Heroku/ruby-1.9.2/lib/ruby/gems/1.9.1/gems/foreman-0.63.0
/lib/foreman/engine.rb:368:in `block in watch_for_output'
12:57:38 web.1  | exited with code 1
12:57:38 system | sending SIGKILL to all processes

(venv) C:\Users\me\Desktop\Code\heroku_python_app>

hello.py

import os
from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return 'Hello World'

Procfile

web: gunicorn hello:app

EDIT 1

After reading this answer, I did the following:

gem uninstall foreman   
gem install foreman -v 0.61.0

However, when I reran foreman start I'm getting this error now

(venv) C:\Users\me\Desktop\Code\heroku_python_app>foreman start
14:13:20 web.1  | started with pid 252
14:13:20 web.1  | exited with code 1
14:13:20 system | sending SIGKILL to all processes
14:13:20        | Traceback (most recent call last):
14:13:20        |   File "C:\Users\me\Desktop\Code\heroku_python_app\venv\Scri
pts\gunicorn-script.py", line 9, in <module>

(venv) C:\Users\me\Desktop\Code\heroku_python_app>

Any assistance will be really appreciated. Thanks in advance.

Answer 1

I fixed this problem by running the following:

gem uninstall foreman
gem install foreman -v 0.61.0 [EDIT]

As mentioned here.