default: VirtualBox VM is already running.

I have cloned an existing Vagrantfile, changed the properties "config.vm.box" and "config.vm.host_name", and done a "vagrant up" hoping to have a brand new VM available. After all this is what Vagrant should be good at.

Nope. It keeps saying:

Bringing machine 'default' up with 'virtualbox' provider...
==> default: VirtualBox VM is already running.

I had to do a "vagrant destroy" of my previously running VM, then a "vagrant up" of both.

ruby --version
ruby 2.0.0p353 (2013-11-22) [x64-mingw32]

vagrant --version
Vagrant 1.6.3

There you have a workaround.... however I am quite skeptical that Vagrant "fails" on such a basic operation... I am NOT impressed... I am unconditionally unimpressed by whatever turns around Ruby, the language is way too unstable and buggish when you compare to Java... I really wish all this Puppet/Vagrant world had not used Ruby as implementation language...