# Drivers not updating on "display" field

I have an issue where my driver value never updates. I want to drive the "display" % field under particles, but the driver value never changes. These pictures should explain better:

Any idea what's wrong here? Or is there another way to globally change the display % of particles? I'm using 2.77.

• Hard to tell exactly what your issue is here. Particle draw_percentage is an integer with values ranging from 0 to 100. In both your example images you are looking at a transform channel, eg x location, which has a negative float value eg -70.91, which will map to 0 as a value for draw_percentage. Apr 14 '16 at 7:50
• Hi, yes, the strange thing is that the driver value changes when its mapped to the rotation, but not when mapped to draw percentage. the bit i underlined never changes, no matter where you move the empty, while using the same empty and the value does change on the second one. Apr 14 '16 at 13:23
• I'm confused, the first image has the Cube as the driver variable target object. Apr 14 '16 at 14:32

import bpy