How do you create Protected Simulink Block in R2012b?

How do you create a Protected Simulink Block from within R2012b (32-bit) MATLAB (Simulink 8)?

I have tried to follow the online MATHWORKS documentation on this, but it seems to be only for the more recent version R2016a, including the fact that this procedure seems built-in to the right-click Sub-system/Reference model function in more recent MATLABs.

Answer 1

[Walter Roberson]

In R2012a you can protect a model; see http://www.mathworks.com/help/releases/R2012b/rtw/ug/create-a-protected-model-using-the-model-block-context-menu.html

See also https://www.mathworks.com/matlabcentral/answers/552-protecting-a-simulink-block-with-a-password

Password protection for blocks was implemented in R2013b.

See also https://www.mathworks.com/matlabcentral/newsreader/view_thread/297804

Answer 2

[Jonathan Stevenson]

Does this also work on a Subsystem? Or does the block have to be a Referenced Model? The block I'm trying to Protect is a sub-system. My attempts to convert it to a Referenced Model generates an error "Cannot convert Virtual Subsystem to Referenced Model"?

[Walter Roberson]

I am not very familiar with the topic. The information I found suggests that in R2012a that it had to be an entire model, not a subsystem, unless you were just configuring access controls (but then the user could potentially configure them back again.)