simulink subsystem replacement issue

when i run the following script, nothing happened with out any error, any one can help, thanks in advance.
open_system('untitled20230208');
open_system('untitled20230713');
replace_block('untitled20230208','untitled20230208/OldSub','untitled20230713/NewSub');
set_param('untitled20230713','SimulationCommand','Update');

 采纳的回答

Angelo Yeo
Angelo Yeo 2023-7-13
Unfortunately, single usage of "replace_block" does not allow you to replace a whole subsystem.
The "replace_block" is used to replace the simulink block, not the entire subsystem, so the "replace_block" API alone cannot be used to replace the entire subsystem. To implement exactly the workflow you want, you need to use the "add_block" and "add_line" functions to copy and paste all the contents of the source subsystem and associated port configuration into the target model.

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