Setting Design Variables in Circuit

[georgmichel]

Hi,

I have a Circuit design with a design variable named subst_thickness in it. I do

aedtapp = Circuit('Project6', 'Circuit1')
print(aedtapp["subst_thickness"])

and it prints the correct value. But when I try to change it e.g. with

aedtapp["subst_thickness"] = "1.0mm"

then PyAEDT says:

PyAEDT ERROR:     desktop_object.ChangeProperty(
PyAEDT ERROR: AEDT API Error on set_variable
PyAEDT ERROR: Last Electronics Desktop Message - [error] script macro error: property 'subst_thickness' does not exist. (05:28:58 pm  jul 21, 2025)

The same happens when I use VariableManager.set_variable(). What can I do?

Thanks
Georg

PS: The same thing works with Hfss() instead of Circuit()

[gmalinve]

Hi @georgmichel,

I tested it and I can't reproduce your issue.
My Maxwell design has a variable with initial value at 23deg:

and I change it with:

from ansys.aedt.core import Maxwell3d

m3d = Maxwell3d(version="2025.2")

m3d["test"] = "12deg"

and I get:

I have the same correct behavior for Hfss and Circuit.

You can provide more information if it's still needed.

Giulia