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');

Answer 1

[Angelo Yeo]

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.

[wenchao zhang]

thank you, Angelo，now i know the reason.