Livelink for Matlab material definition issue

Hello,

My problem is the following:

I am defining a RF model:

[...]
model.physics().create('rfw1', 'ElectromagneticWaves', 'geom1');
model.study().create('study1');
s1 = model.study('study1');
s1.feature().create('struct','ModeAnalysis');
[...]

This physics/study requires to define the relative permittivity, permeability and electrical conductivity.

To define my material from Matlab, I use without success with version 4.3a:

[...]
mat1 = model.material.create(['mat' num2str(I)]);
mat1.materialmodel('def').set('mur','1');
[...]

or

[...]
mat1 = model.material.create(['mat' num2str(I)]);
mat1.materialmodel('def').set('Relative permeability','1');
[...]

When I look at it within the GUI, I see that the requested field is not filled but there is another with the same property name (equal to the Name property) see attachement. Of course, the computation failed since the required field is not propoerly filled.

Where is my mistake?

Thank you all,

Denis