List index out of range

[som3oneMw]

I'm trying to get this working with TouchDesigner (using an adafruit-hat & 3* 32x32 panels) and I'm successfully getting information sent from TouchDesigner to the Pi, but rpi-matrix-artnet is not able to process them and I keep getting the following message:

Unhandled Error
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/twisted/python/log.py", line 86, in callWithContext
return context.call({ILogContext: newCtx}, func, *args, **kw)
File "/usr/local/lib/python2.7/dist-packages/twisted/python/context.py", line 122, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/usr/local/lib/python2.7/dist-packages/twisted/python/context.py", line 85, in callWithContext
return func(*args,**kw)
File "/usr/local/lib/python2.7/dist-packages/twisted/internet/posixbase.py", line 614, in _doReadOrWrite
why = selectable.doRead()
--- exception caught here ---
File "/usr/local/lib/python2.7/dist-packages/twisted/internet/udp.py", line 249, in doRead
self.protocol.datagramReceived(data, addr)
File "rpi-matrix-artnet.py", line 154, in datagramReceived
self.showDisplay(display_size_x,display_size_y,frameBuffer,rgbframeLength)
File "rpi-matrix-artnet.py", line 166, in showDisplay
b = datastream[idx]
exceptions.IndexError: list index out of range