How to declare and use local variable in level 2 s-function?

I have a scenario in which I have to connect to client once and then need to use same connection object for further processing. I am planning to connect client in START function in S-function and in same block I want to declare variable which can be access from OUTPUT block for further processing. So please suggest me some way to achieve this or give some reference example. Thanks....

Answer 1

[Mark McBroom]

You will need to set up a "DWork" variable that gets assigned a value in the mdlStart() function and can then be used in the mdlOutput() function. This link gives details on creating and using a DWork variable in an s-function.

[Ankitkumar Viradiya]

Thanks for the answer. I have tried these methods already but it is working for just int,double or boolean data types. But I have custom class object and I want to pass this object via Dwork variable. While doing so it throws an error even if I use "inherited" data type. So please guide me how to handle such class object in s-function in matlab file. I am not using c/c++ file to do this. Please guide me on this. Thanks in advance.