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Hi

I can only dvice you to ask also "support", but document well your case and give them the models so they can quickly reproduce the issue

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Good luck
Ivar

Hello!
I want to be able to modify the geometri by alterning the some constants in a m-file.
for exemple instead of entering the number 0.048 i want to create a constant, like
width=0.048;

But as soon as i put width instead of a number, matlab can run the last line?! why?
I tryed all diffrent ways. This did work in the old version 3.5 but I can't understand how in version 4?

% Geometry of a Rectangle
model.geom('geom1').feature.create('r1', 'Rectangle');
model.geom('geom1').feature('r1').setIndex('size', '0.048', 0);
model.geom('geom1').feature('r1').setIndex('size', '0.138', 1);
model.geom('geom1').feature('r1').set('base', 'center');
model.geom('geom1').feature('r1').setIndex('pos', '0.024', 0);
model.geom('geom1').run('r1');


Have a nice day

what is the error you're getting? the above code ran fine for me.

Hi! yes, that code woks good untill I exchange the number 0.048 with a constant, like a,
so if I write

%Constants
a=0.048

% Geometry of a Rectangle
model.geom('geom1').feature.create('r1', 'Rectangle');
model.geom('geom1').feature('r1').setIndex('size', 'a', 0); % Put in the constant instaed of 0.048
model.geom('geom1').feature('r1').setIndex('size', '0.138', 1);
model.geom('geom1').feature('r1').set('base', 'center');
model.geom('geom1').feature('r1').setIndex('pos', '0.024', 0);
model.geom('geom1').run('r1');


MATLAB says:

??? Java exception occurred:
Exception:
com.comsol.util.exceptions.FlException: Unknown model parameter
Messages:
Unknown model parameter


Stack trace:

at com.comsol.nativeutil.properties.Property.a(Unknown Source)....

Shoulden't this be working?? And I have tryed without the ' '.

regards
Olivia

Hi Olivia,

Did you define it first in the global parameters section?

i.e.

model.param.set('a','0.2');