Instant Rails installed on D drive doesn't appear to work

I have installed InstantRails on the D drive and configured the Windows
Hosts file on the C drive with the lines typo

Trouble is, when I start the Rails Applications Cookbook with the "Start

with Mongrel" button, the DOS window opens without showing anything and
then closes almost immediately.

The problem is occurring here. The Mongrel web server is not starting up (the console window should stay open and you should see Mongrel status messages), so you’re not going to be able to proceed and with the browser until this is fixed.

First, check these two log files to see if there are any clues in there to tell you what is going wrong:



If that doesn’t tell you anything useful, then manualy open a ruby console window by selecting the menu item:

Rails Applications >> Open Ruby Console Window

Then, move into the cookbook directory (“cd cookbook”) and try to start Mongrel with this command:

mongrel_rails start

When this fails, you should (hopefully) see some message saying why.


Thanks for the advice but there is still a problem somewhere. Your first
suggestion didn’t show anything (no log files appeared under

InstantRails\rails_apps\cookbook\log\ at all!). I then followed your
second suggestion to open the Ruby Console Window and enter
mongrel_rails start. In this case the Mongrel Server appeared to open
fine with no errors, and the mongrel_debug file appeared under the

InstantRails\rails_apps\cookbook\log\ directory! (note:the Start with
Mongrel button is still just giving an empty window that closes

Hmmm… Sounds like IR may not have relocated all the paths to your current installation directory. When IR is not running, edit the file “InstantRails.ini” in your IR root directory and locate the line that starts with “OldRunningPath=” and then delete the path after the equals sign (leaving just “OldRunningPath=” on the line).

Now start IR and say “yes” when it asks if you want to update the configuration files.

See is the start, mongrel button works now.

With the Mongrel server started from the ruby console window, I then
attempted to open
with my internet browser and
got the following message:

Proxy Error
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /.

Reason: Error reading from remote server

Apache/1.3.33 Server at
Port 80

Please note that I am not using a proxy server in my browser. I next
tried to comment out the following in the Apache config file:

<VirtualHost *>

ProxyPass / http://localhost:3001/
ProxyPassReverse / http://localhost:3001

This resulted in the browser coming up with the text from the index.html
file from the www directory, but nothing further.

Put the VirtuaHost back, you’ll need that (eventually). After you start Mongrel, it will say what port number is started the Rails app on (I think it should be port 3001), try browsing directly to the Mongrel server:

Did that work?

During development of a Rails app, you’ll be browsing directly like this anyway. Proxying through Apache is only for when you want to simulate a production environment.


I received reports that that this can fix weird problems like what you two are having… Open a command window and run the command:

netsh winsock reset

Then see if things now run as expected.


I'd also make sure that you don't have anything else trying to use port
80 or 3001... stuff like Skype or another webserver. I've had problems
with mongrel failing to start only to discover that something else was
using that particular port. The error message that shows up in this
case is fairly cryptic.