Can I add line after closing simulink model?

I have written code to build a simulink model. Since I want to add line afterwards, I use two variables, one of them is an array containing all the handles taken from add_block function, the second variable is used to store structs taken from get_param(handle,'PortHandles').

It's like this:

H=[H;addblock()] % array
P=[P;get_param(H(length(H)),'PortHandles')] %array of struct variables

When it ends to add all the blocks, the model is saved and closed. then I try to write commands from Command Window:

e.g. open_system('sas') add_line('sas',P(1).RConn(1),P(2).LConn(1))

It gives an error:

??? Invalid Simulink port handle

I don't have this error, if I run add_line before saving and closing the script, i.e while my script is still running.

Can you understand why? P and H are readable in Workspace even after I close the model!

Answer 1

[Kaustubha Govind]

I don't think the handles are valid once the model is closed and re-opened. You need to use find_system to grab the handles again.