Output of my fuzzy controller is constant even when the ruleviewer block shows otherwise

I am using a fuzzy controller in my simulink model and am using the block with rule viewer. When I simulate the system for any length of time, for some reason the out is the initial default value of the controllers for all time. I can see in ruleviewer that the output is being changed as the simulation proceeds but the actual output is constant. Help would be appreciated

[Pouya Jamali]

I have the same problem! Maybe it is a bug :-|

[fiza fiza]

I also have the same problem. I don't know how to fix this.. I use R2015a.

[Arthur Fagundes]

same problem here

[Arthur Fagundes]

Solved my problem today. In my case, the issue was that the input was assuming values out of the range of the rules... (out of the universe of discourse). When I added saturation blocks to the input of the fuzzy controller, it worked perfectly!