how to access a variable defined in a Simulink.SimulationInput class on the base workspace?

I am using parsim to run parallel simulation with different paramters, I use Simulink.SimulationInput calss to create a row of input parameters for each simulation. But the problem is that in my simulation model I have callbacks. As I understand model or block callbacks in parsim can not have access to the modelworkspace variables. I tried to use setPreSimFcn to replace the callbacks to function which run to each worker before simulation start but for that I need to know what is the command to access a variable defined in a Simulink.SimulationInput class on the base workspace?

[Rahul Kumar]

Hi Laila,

Can you please let me know what callbacks function you currently have and what are they trying to do? Maybe there is a way to do what you are trying to do without using the callbacks.