Programatically parametrize and 'refresh' CAN Pack and Unpack blocks

I am trying to automate some processes and programatically create a model that contains CAN Pack and Unpack blocks.

When I parametrize the mask parameters in the script, the output is as attached in the image (Message Name and dbc appear correctly, is there a way to -

1. Emulate mask button press 'OK' or 'Apply' so the input ports are generated without human intervention? OR
2. Pass the mask params to underlying S-func so it updates the block?

mdlname = 'Trial_VCCU';
new_system(mdlname);
open_system(mdlname);

x = 100;
y = 100;
    
msgname = 'VCVCCU_ChargeToVehicle';
file = 'C:\repos\VECU IO\EV_CAN.dbc';

canmsglib = 'canmsglib/';
unpack = [canmsglib 'CAN Unpack'];
pack = [canmsglib 'CAN Pack'];

msgpack_hndle = add_block(pack, [mdlname '/' msgname '_Pack']);
set_param(msgpack_hndle, 'Position',[x, y, x+1000, y+600],...
    'DataFormat', 'CANdb specified signals', 'CANdbFile', file, 'MsgList', msgname);

Current ouput - A.

Preffered output - B.

Thanks in advance!

Have referred to this but would prefer another solution if it has been found-

https://www.mathworks.com/matlabcentral/answers/294355-how-can-i-click-on-ok-or-apply-button-programmatically

Answer 1

[Ansh Gandhi]

Solved this in an ad hoc way in the end by using the java keypress events in the script.