How to save Simulink model without model workspace saved

I have a Simulink model named “input_check.slx” and I want to load model parameters loaded from an external .mat file. After I run the model (out = sim(‘input_check’);), I want to save the model to the file of same name without its parameters in model workspace saved and close the system ‘input_check’. For some reason, I want the model workspace cleared when I close system so I set 'SaveModelWorkspace' = false

load_system('input_check')
hws = get_param('input_check', 'modelworkspace');
hws.DataSource = 'MAT-File';
hws.FileName = 'slx_input_check_pars.mat';
hws.reload; %reload variable from an external file to model workspace
out = sim('input_check')
save_system('input_check',[],'SaveModelWorkspace',false)
close_system('input_check')
load_system('input_check')
hws = get_param('input_check', 'modelworkspace');

After I save and close the model I load the system and get the model workspace (last two lines in code) and figure out the data source for model workspace is still there and is the .mat file I loaded earlier. I think set ‘SaveModelWorkspace’ = False should clear the model workspace but obviously not. What cause this issue? Also if I want to save the model to the file of same name without its parameters in model workspace saved, am I doing correctly?

Matlab Version is R2020a.

Answer 1

[Rishabh Mishra]

Hi,

I’m assuming you want to clear the model workspace once you close it. You can do so by:

1. Go to model settings>model properties in the MODELLING tab in the Simulink model.
2. In model properties go to callbacks tab, In the ‘PostLoadFcn’ section, copy the code given below.

mdlWks = get_param('input_check','ModelWorkspace');
clear(mdlWks);

Click apply and save the model.

Once you close the model & open it again the next time, the model workspace gets cleared.

For better understanding, refer the following article:

• clear variables from model workspace

Hope this Helps.

Answer 2

[Sudhakar Shinde]

If you dont need any data from model workspace you could clear whole model workspace data simply by two lines.

before save you can use below:

mdlWks = get_param('input_check', 'modelworkspace');
clear(mdlWks);
save_system('input_check');

[Hainan Wang]

Thank you!