Monitoring Graphs Broken

[downtown]

When i try to view a traffic graph for 1 Month, I get a javascript console error:

Uncaught TypeError: Cannot read property 'length' of undefined(…) in d3.min.js line 1

t	@	d3.min.js:1
(anonymous function)	@	status_monitoring.php:993
arguments.length.each.function.n.textContent	@	d3.min.js:3
(anonymous function)	@	d3.min.js:3
Y	@	d3.min.js:1
Co.each	@	d3.min.js:3
Co.text	@	d3.min.js:3
(anonymous function)	@	d3.min.js:5
(anonymous function)	@	d3.min.js:5
Y	@	d3.min.js:1
Yl.each	@	d3.min.js:5
n	@	d3.min.js:5
Co.call	@	d3.min.js:3
(anonymous function)	@	nv.d3.js:1626
(anonymous function)	@	d3.min.js:5
Y	@	d3.min.js:1
Yl.each	@	d3.min.js:5
chart	@	nv.d3.js:1610
Co.call	@	d3.min.js:3
(anonymous function)	@	nv.d3.js:9570
(anonymous function)	@	d3.min.js:5
Y	@	d3.min.js:1
Yl.each	@	d3.min.js:5
chart	@	nv.d3.js:9377
Co.call	@	d3.min.js:3
(anonymous function)	@	status_monitoring.php:1142
renderLoop	@	nv.d3.js:99

…after which no graph can be displayed until I reload the page.

[tyler.szabo]

Looks like it's a bug - https://forum.pfsense.org/index.php?topic=117036.msg662633#msg662633