virtualbox issue

[ShivaShankar]

1)downloaded vbox
2)Start up VirtualBox, then select File>Import Appliance and select the .ova file.
3)Next, press the "Import" button.
This will unpack and import the VM in your local machine. It will take a while - the unpacked image is about 3 GB.

When Press the "Start" arrow icon or double-click your VM within the VirtualBox window, it is giving below errors

Failed to open a session for the virtual machine pyretic_0.2.0_1.
The virtual machine 'pyretic_0.2.0_1' has terminated unexpectedly during startup with exit code 1.


Result Code:
NS_ERROR_FAILURE (0x80004005)
Component:
Machine
Interface:
IMachine {22781af3-1c96-4126-9edf-67a020e0e858}

[Ramshankar]

Please provide a VBox.log for the VM that failed to start.