error in the fuzzy logic controller's Evaluate Rule Consequents Block

I tried to design a PD controller with a fuzzy logic controller as a modification to it.

I also implemented Particle swarm Optimization algorithim to tune my controller's static variables.

But when I run my PSO.m file in order to tune my controller , I got a error---------------------------------------------------------------------------------------------

"Error occurred while attempting to call the error callback function 'Stateflow.Translate.translate' of subsystem

'SMG/Subsystem/Subsystem1/Fuzzy Logic Controller/Evaluate Rule Consequents'. The callback function should take a

block handle and error ID as input arguments, and return a character vector that replaces the error produced

within the subsystem. The following error was produced when the error callback function was called: Not enough

input arguments."

[Sam Chak]

Hi @Abhishek

What is the system that you want to regulate with the PSO-tuned fuzzy PD?

Are you able to stabilize the system with a non-fuzzy PD compensator?

If so, does the error occur when attempting to tune only the PD gains?