"Application has failed to start because MSVCR90.dll was not found" error message

I’m struggling trying to get even the chapter 1 example running.

When I run “ruby script\server” on my Windows XP machine using Ruby 1.8.6 with Rails 2.1.2, I get the error message “Ruby.exe – Unable to locate component: This application has failed to start because MSVCR90.dll was not found. Re-installing the application may fix this problem”. This error appears during the “Booting WEBrick” phase. If I click OK, then the WEBrick server appears to start, but Facebook reports a “Received HTTP error code 500 while loading http://:3000/” error message.

I have previously developed Facebook applications using RFacebook and Rails, so I think my rails install is good and working. And I don’t receive the MSVCR90.dll error message when I start my old RFacebook rails application, only when starting the network_test application from the source code provided.

Any ideas?

Thanks,
Will

That sounds like a dependancy issue. Are you using the json gem? If so, you should try json-pure instead. Do you get any kind of stack trace? Can you still run your other Rails applications using script/server?

Mike