"vagrant up" failing: Vagrant VM failed to remain in the running state

The command `vagrant up` is failing and I don't know why. ``` $ egrep -v '^ *(#|$)' Vagrantfile VAGRANTFILE_API_VERSION = "2" Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| config.vm.box = "precise32" end $ vagrant up Bringing machine 'default' up with 'virtualbox' provider... [default] Importing base box 'precise32'... [default] Matching MAC address for NAT networking... [default] Setting the name of the VM... [default] Clearing any previously set forwarded ports... [default] Creating shared folders metadata... [default] Clearing any previously set network interfaces... [default] Preparing network interfaces based on configuration... [default] Forwarding ports... [default] -- 22 => 2222 (adapter 1) [default] Booting VM... [default] Waiting for VM to boot. This can take a few minutes. The VM failed to remain in the "running" state while attempting to boot. This is normally caused by a misconfiguration or host system incompatibilities. Please open the VirtualBox GUI and attempt to boot the virtual machine manually to get a more informative error message. $ vagrant status Current machine states: default poweroff (virtualbox) The VM is powered off. To restart the VM, simply run `vagrant up` $ VBoxManage list runningvms $ ``` Here are the messages in the VirtualBox log file, VBoxSVC.log: ``` $ cat ~/.VirtualBox/VBoxSVC.log VirtualBox XPCOM Server 4.2.16 r86992 linux.amd64 (Jul 4 2013 16:29:59) release log 00:00:00.000499 main Log opened 2013-08-13T18:40:45.907580000Z 00:00:00.000508 main OS Product: Linux 00:00:00.000509 main OS Release: 3.6.11-4.fc16.x86_64 00:00:00.000510 main OS Version: #1 SMP Tue Jan 8 20:57:42 UTC 2013 00:00:00.000537 main DMI Product Name: X8DA3 00:00:00.000547 main DMI Product Version: 1234567890 00:00:00.000647 main Host RAM: 24103MB total, 17127MB available 00:00:00.000654 main Executable: /usr/local/VirtualBox/VBoxSVC 00:00:00.000655 main Process ID: 9417 00:00:00.000656 main Package type: LINUX_64BITS_GENERIC 00:00:00.110125 nspr-2 Loading settings file "/opt/tomcat/.VirtualBox/VirtualBox.xml" with version "1.12-linux" 00:00:00.110817 nspr-2 Failed to retrive disk info: getDiskName(/dev/md126p1) --> md126p1 00:00:00.264367 nspr-2 VDInit finished 00:00:00.275173 nspr-2 Loading settings file "/opt/tomcat/VirtualBox VMs/vagrant_getting_started_default_1376419129/vagrant_getting_started_default_1376419129.vbox" with version "1.12-linux" 00:00:05.288923 main ERROR [COM]: aRC=VBOX_E_OBJECT_IN_USE (0x80bb000c) aIID={29989373-b111-4654-8493-2e1176cba890} aComponent={Medium} aText={Medium '/opt/tomcat/VirtualBox VMs/vagrant_getting_started_default_1376419129/box-disk1.vmdk' cannot be closed because it is still attached to 1 virtual machines}, preserve=false 00:00:05.290229 Watcher ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={3b2f08eb-b810-4715-bee0-bb06b9880ad2} aComponent={VirtualBox} aText={The object is not ready}, preserve=false $ ``` Any advice would be greatly appreciated.