Problem with mscom.rb in Windows

[owengriffin]

Hi,

I´m encountering the following issue when using virtualbox in Vagrant:

   c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/com/implementer/mscom.rb:81:in `block in spec_to_args': undefined method `to_sym' for [:Medium]:Array (NoMethodError)
    from c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/com/implementer/mscom.rb:76:in `collect'
    from c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/com/implementer/mscom.rb:76:in `spec_to_args'
    from c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/com/implementer/mscom.rb:49:in `call_function'
    from c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/com/abstract_interface.rb:134:in `call_function'
    from c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/com/abstract_interface.rb:51:in `block in function'
    from c:/ruby192/lib/ruby/gems/1.9.1/gems/virtualbox-0.8.3/lib/virtualbox/vm.rb:559:in `destroy'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/destroy.rb:11:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/clear_nfs_exports.rb:15:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/halt.rb:24:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/discard_state.rb:17:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/env/set.rb:13:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/builder.rb:120:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action.rb:131:in `block in run'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/util/busy.rb:19:in `busy'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action.rb:131:in `run'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/import.rb:29:in `recover'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:49:in `block in begin_rescue'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:48:in `each'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:48:in `begin_rescue'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:39:in `rescue in call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:24:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/host_name.rb:10:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/share_folders.rb:15:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/clear_shared_folders.rb:14:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/nfs.rb:39:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/provision.rb:17:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/forward_ports.rb:88:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/clear_forwarded_ports.rb:17:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/customize.rb:16:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/clean_machine_folder.rb:17:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/check_guest_additions.rb:25:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/match_mac_address.rb:16:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/import.rb:21:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/vm/check_box.rb:23:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action/warden.rb:28:in `call'
    from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/actio

n/builder.rb:120:in call' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action.rb:131:inblock in run'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/util/busy.rb:19:in busy' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/action.rb:131:inrun'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/vm.rb
:136:in up' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/command/up.rb:13:inblock in execute'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/command/up.rb:8:in each' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/command/up.rb:8:inexecute'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/task.rb:22:in run' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/invocation.rb:118:ininvoke_task'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/invocation.rb:124:in block in invoke_all' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/invocation.rb:124:ineach'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/invocation.rb:124:in map' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/invocation.rb:124:ininvoke_all'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/group.rb:226:in dispatch' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor0.14.6/lib/thor/invocation.rb:109:ininvoke'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/lib/vagrant/cli.rb:45:in block in register' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/task.rb:22:inrun'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/invocation
.rb:118:in invoke_task' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor.rb:263:in dispatch'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/thor-0.14.6/lib/thor/base.rb:38
9:in start' from C:/Ruby192/lib/ruby/gems/1.9.1/gems/vagrant-0.7.2/bin/vagrant:15:in <top (required)>'
from C:/Ruby192/bin/vagrant:19:in load' from C:/Ruby192/bin/vagrant:19:in

'

Any ideas?

Sorry about the bad format of this!

[alexpott]

This happened to me too. The issue was I'd disabled the Virtualbox host-only network adapter. Enabling it resolves the issue.