** ERROR: Link failed (source linkable is invalid)

[mhead10]

For some reason, my firewire card (connected to phantom omni's from sensable) has to be plugged in (even though I'm not using the omni joystick) for my code to not produce the previous error. I'm not currently sure why they have to be plugged in since initially I was able to run the code without them being plugged in.

If I don't have the omni's plugged in, I get the following error:

** ERROR: Failed to connect to haptic device (Invalid value specified for a function that is attempting to set a value.)
** ERROR: Failed to create extension sensor with sensable3.dle
** ERROR: Flagged linkable failed (linkable is invalid)
Loading File: open_babcock.dae
** ERROR: Link failed (source linkable is invalid)

My device code is:

sensable = viz.add('sensable3.dle') 
device = sensable.addHapticDevice()
device.workspace.setScale([100,100,100])
device.workspace.setPosition([0,0,0])

marker = viz.add('open_babcock.dae', pos=[0, -15, 5], euler=[0,300,0],scale=[.8,.8,.8]) 
link_1 = viz.link(device,marker) 
link_2 = None

If I have my firewired card plugged into my laptop, then my code runs fine.