vboxwrapper version is 0.92 and setup via python2.7
the OS is ubuntu gnome 14.10
Gns3 1.2.dev1

when I try to start one virtual machine , the Gns3 1.2.dev1 console pops up:

Server error [-3200] from 127.0.0.1:8000: WinntTS: unable to start instance 'WinntTS': WARNING:vboxwrapper.virtualbox_controller:cannot unlock the machine for WinntTS, retrying 1: 0x8000ffff (The session is not locked (session state: Unlocked))
WARNING:vboxwrapper.virtualbox_controller:cannot unlock the machine for WinntTS, retrying 2: 0x8000ffff (The session is not locked (session state: Unlocked))
WARNING:vboxwrapper.virtualbox_controller:cannot unlock the machine for WinntTS, retrying 3: 0x8000ffff (The session is not locked (session state: Unlocked))
ERROR:vboxwrapper.vboxwrapper:Could not unlock the machine after 4 retries: 0x8000ffff (The session is not locked (session state: Unlocked))

and the virtual machine can not be launched.

so could you tell me how to fix it , thank you !

Hi
I'm trying to work with the new gns3 version 1.1, and I installed vboxwrapper, then I find the route of vboxwrapper

type vboxwrapper
The result
vboxwrapper is /usr/local/bin/vboxwrapper

Then I go to preferences/virtualbox a put this route in gns3.
After I try to call some of my virtualmachines but I get the following mistake

ZeroMQ client (virtualbox) sending JSON-RPC custom error: vboxwrapper path doesn't exist (/usr/local/bin/vboxwrapper for call id 01d9311c-d3f6-48b2-9400-2359efa424b8 2014-11-17 09:00:55.512 Python[650:13636] modalSession has been exited prematurely - check for a reentrant call to endModalSession:

What am I doing wrong?