Simulink.SubsystemReference.convertAllSubsystemReferenceBlocksToSubsystem(mdl)
converts all Subsystem Reference blocks in the model mdl to Subsystem
blocks.
You can also select a web site from the following list:
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.