Currently, there is no Initialization block in Simulink.
To work around this issue, you can create your own masked subsystem that prompts the user to enter a script name and then performs a specific callback routine, such as executing the script when the block diagram is loaded.
For example, the model test_init.mdl calls the simple script my_init.m, which allows a user to enter a script name. The script is executed before the simulation runs. In this case, the 'StartFcn' callback parameter is set, so the script is evaluated immediately before the simulation runs. You can use any of the callback routines you wish depending on when you want the user's script to be executed. More information on the model callback parameters is available in the documentation linked below:
The model test_init.mdl and the script my_init.m are available in the following Related Documents/Files.
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