MATLAB: Do I get a “Reference to non-existent field” error when installing a Support Package

When installing a Support Package, why do I see the error "Reference to non-existent field"?

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This error will occur if you do not have permission to install software on your machine. One solution is to launch the Support Package Installer with Administrative permissions, if you have them.

Alternatively, an administrator can change the permissions for the MATLAB installation directory so that regular users can write to this directory. A regular user can then attempt to run the Support Package Installer again.

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MATLAB: Do I get the error “The support packages in the folder are not of the expected type.” when installing a support package from a folder

This error indicates that you are trying to install a Software support package through the Hardware support package installer or vice versa. For example, if you are trying to install the MinGW compiler, you will see this error if you have opened the Hardware Support Package Installer instead of the Software Support Package Installer.

If you see this error when installing a support package, try launching the other Support Package installer.

To launch the Software Support Package Installer, use this command:

hwconnectinstaller.launchInstaller('supportcategory','software')

To launch the Hardware Support Package Installer, use this command:

hwconnectinstaller.launchInstaller('supportcategory','hardware')

MATLAB: “Reference to non-existent field” Error

Well, yes, you never use the input parser to parse your input, so the Results never get populated.

p.parse(system);

after you've created the parser but before you use the Results.

edit: on the other hand, your input parser is not very useful, it only checks that one input has been passed but you'll get an error beforehand if it's not the case. You don't check that the input is a structure with the correct fields

You'd be better off with:

function channel_cell = generate_channel_cell(system)
assert(isstruct(system) && all(ismember(fieldnames(system), {'Nt', 'Nr', 'Ns', 'K'}), 'system must be a structure with fields Nt, Nr, Ns and K');
Nt = round( p.Results.system.Nt ) ;
%...

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MATLAB: Do I get the error “The support packages in the folder are not of the expected type.” when installing a support package from a folder

MATLAB: “Reference to non-existent field” Error

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