??? parameter must be a handle array

I'm trying to write a matlab script to design a MPC controller tocontrol a desiel engine. I'm following the steps in the tutorial "MPC control for a chemical reactor with multiple operating conditions" when I try to specify values for inputs and outputs at inital conditions op.Inputs(1).u=1 I always get this error message ??? Parameter must be a handle array.

I hope anyone help me on this

Answer 1

[Arkadiy Turevskiy]

Hard to say what is happening without access to your code and model. Did you do

op = operspec('CSTR_INOUT');

for your model to create op.point specification object?

What do you get if you type

>>op
>>op.Inputs

If you ares till stuck, contact tech support.