id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	blockedby	blocking	notify_on_close	platform	project
999	SignalViewer playback error	Tom Goddard	Tom Goddard	"Pressing Play button next to signal viewer slider after loading .npz file gives this error.

Error processing trigger ""new frame""
Traceback (most recent call last):
File ""C:\Program Files\ChimeraX-Jan-9-2018\bin\lib\site-packages\chimerax\core\triggerset.py"", line 126, in invoke
return self._func(self._name, data)
File ""C:\Program Files\ChimeraX-Jan-9-2018\bin\lib\site-packages\chimerax\core\ui\widgets\slider.py"", line 133, in next_value_cb
if v >= self.value_range[1]:
TypeError: '>=' not supported between instances of 'NoneType' and 'int'"	defect	closed	moderate		Volume Data		fixed						all	ChimeraX