Refined Mesh with generateMesh() using PDE toolbox

I'm trying to create a refined mesh on specific edges on my geometry with generateMesh(). My original program has the following for creating a mesh using the PDE tool box.

generateMesh(tModel,... % create mesh from geometry
                'GeometricOrder','linear',... % elements are 3-noded
                'Hmin',Hmin,... % miminum edge length
                'Hmax',Hmax,... % maximum edge length
                'Hgrad',Hgrad); % mesh element growth rate

To create a refined mesh on specispecific edges I tried inputting the following in this documentation:

generateMesh(tModel,'Hedge',{[42:101],0.001});%'Hvertex',{[6 7],0.002});

But when I run this command in MATLAB, I get an error saying that "Hedge" isn't a recognized parameter (see below). I also tried using "Hvertex" instead, and I get the same error. I'm a little bit confused because this input is supported in the PDE toolbox documentation.

'Hedge' is not a recognized parameter. For a list
of valid name-value pair arguments, see the
documentation for this function.

Error in createThermalModelArkChamber (line 40)
    m3 =
    generateMesh(tModel,'Hedge',{[42:101],0.001});%'Hvertex',{[6
    7],0.002});

Answer 1

[zoelle wong]

Edit- found the reason why. Turns out I needed to install MATLAB 2021b and delete my current MATLAB version (2021a) since the PDE toolbox on 2021a had bugs. Does anyone know if there's a way to merge the 2021b version to 2021a version? All the documentation I read so far has said that it's better to delete the older MATLAB version and just use the newest version.