subsystem does run updated when in fast restart

I have created a logic circuit in simulink, then i selected a group of them to create a subsystem. i included some buttons to yield Boolean inputs. the problem is that when i run in "Enable fast restart" the subsystem output and inputs does not updated automatically when i change the inputs. Someone else knows what is the problem??

Answer 1

[Yu Jiang]

Not sure if this is the real issue here, but in Fast Restart mode, you can only change tunable parameters

http://www.mathworks.com/help/simulink/ug/using-tunable-parameters.html

What parameters are you changing using that customized button?

Answer 2

[Rostislav Teryaev]

Here:

https://www.mathworks.com/help/simulink/ug/factors-affecting-fast-restart.html

you can find this line:

• When fast restart is on, you cannot change the variant that a variant subsystem or variant model uses. This is because the inactive subsystems are not compiled in the first simulation.