[open] RuntimeError: Unknown Command
--- UPDATED 8/5/15 ---
We are running OpenSesame 2.9.6 on a Windows 7 PC and are setting it up to interface with an Eyelink II tracker. We're still in the early stage of setting up the system, and when running OpenSesame's sample Eyelink experiment, we get this error:
Unexpected error
line: 230
exception message: Unknown Command
exception type: RuntimeError
Traceback (also in debug window):
File "dist\libqtopensesame\misc\process.py", line 139, in run
File "dist\libopensesame\experiment.py", line 347, in run
File "dist\libopensesame\sequence.py", line 47, in run
File "C:\Program Files (x86)\OpenSesame\plugins\pygaze_init\pygaze_init.py", line 198, in run
File "dist\pygaze\eyetracker.py", line 72, in __init__
File "dist\pygaze\_eyetracker\libeyelink.py", line 176, in __init__
File "dist\pygaze\_eyetracker\libeyelink.py", line 230, in send_command
RuntimeError: Unknown Command
Do you have any advice on what we could try next to troubleshoot the connection?
We have the Eyelink software running on the display PC which is connected via Ethernet to our PC running OpenSesame. The connection works, as far as we have been able to see. On the OpenSesame PC, we've installed PyLink 27 as explained here: http://osdoc.cogsci.nl/2.9/devices/eyelink/#installing-pylink
Chris
Comments
Hey,
Which "eyelink experiment" do you mean? The "Pygaze eye tracking template"?
Does the error also occur, when you set the the tracking mode to one of the
dummiesin thepygaze_inititem?Eduard
Hi Eduard,
thanks, yes, we're using the "Pygaze eye tracking template".
and also yes, we don't get the error when we use either the simple dummy or the advanced dummy. We've been using the EyeLink one. That's when we get the Runtime error message.
Ps- We updated to v. 2.9.7 today, but the error persists
Hi guys,
It's probably the force-drift correct option, which sends a command that only the EyeLink 1000 recognizes. This issue is already listed:
For now, what you could do is simply disable this option, and you should be good to go.
Cheers!
Sebastiaan
Check out SigmundAI.eu for our OpenSesame AI assistant!
Hi Sebastiaan,
thanks for pointing us to the earlier thread. Yes, our error message is identical to the one discussed there. We've tried it again, this time with 'Force drift correction (for EyeLink 1000)' disabled, but the error remains exactly the same.
Do you have any other thoughts on how we can troubleshoot this?
-Chris
Hi Chris,
Nevertheless, it's that error--I can tell by the stacktrace in your first post. What seems to be going on is that this option is enabled regardless of whether the box is ticked. A bug on top of a bug, in other words. What happens if you edit the script, and set
eyelink_force_drift_correctto 0 manually:Make sure you don't use the controls to change this afterwards, because it will set this variable back to 'no'.
Cheers!
Sebastiaan
Check out SigmundAI.eu for our OpenSesame AI assistant!
Hi Sebastian,
with these steps, we were able to get the experiment to run once, right after starting up the whole system and OpenSesame, but only once. After that, it's back to the same error, even though the script line still has "0" (and of course the box is unchecked).
Any ideas on how we could make it work permanently?
Thanks -Chris
Hi Chris,
As soon as the plug-in controls get applied, the script is regenerated and your changes to the script are lost. So what you could do for now is change the script, save the experiment, and then run it using opensesamerun (which won't change anything in the script):
This is a pretty annoying problem for EyeLink II users. (And you guys have it difficult enough, with the painful helmet and everything.) I'll commit a small fix to PyGaze next week and upload a repack of OpenSesame 2.9.7 (i.e. the same version of OpenSesame repackaged with an updated PyGaze).
Cheers,
Sebastiaan
Check out SigmundAI.eu for our OpenSesame AI assistant!