Sionna RT - Plugin "itu-radio-material" not found with built-in Munich scene

[abidur0177]

Hello everyone below is the simple code where I add an array of transmitters and a single receiver and I got this specific error. Below is my code and the error.

### CODE

# Import or install Sionna
try:
    import sionna.rt
except ImportError as e:
    import os
    os.system("pip install sionna-rt")
    import sionna.rt

# Other imports
%matplotlib inline
import matplotlib.pyplot as plt
import numpy as np
import mitsuba as mi 
no_preview = True # Toggle to False to use the preview widget

# Import relevant components from Sionna RT
from sionna.rt import load_scene, PlanarArray, Transmitter, Receiver, Camera,\
                      PathSolver, RadioMapSolver, subcarrier_frequencies

scene = load_scene(sionna.rt.scene.munich)
if not no_preview:
    scene.preview();

# Configure antenna array for all transmitters
scene.tx_array = PlanarArray(num_rows=8,
                            num_cols=2,
                            vertical_spacing=0.7,
                            horizontal_spacing=0.5,
                            pattern="tr38901",
                            polarization="VH")

# Configure antenna array for all receivers
scene.rx_array = PlanarArray(num_rows=1,
                            num_cols=1,
                            vertical_spacing=0.5,
                            horizontal_spacing=0.5,
                            pattern="dipole",
                            polarization="cross")

# Create transmitter
tx = Transmitter(name="tx",
                position=mi.Point3f(8.5,21,27),
                orientation=mi.Point3f(0,0,0))
scene.add(tx)

# Create a receiver
rx = Receiver(name="rx",
            position=mi.Point3f(45,90,1.5),
            orientation=mi.Point3f(0,0,0))
scene.add(rx)

# TX points towards RX
tx.look_at(rx)

# Compute paths
solver = PathSolver()
paths = solver(scene,
               synthetic_array= False)

# Open preview showing paths
scene.preview(paths=paths, resolution=[1000,600], clip_at=15.)

Error

[xml.cpp:1078] Error while loading "<string>" (near line 3, col 10): could not instantiate bsdf plugin of type "itu-radio-material": 
[xml.cpp:1078]   [PluginManager] Plugin "itu-radio-material" not found!

[merlinND]

Hello @abidur0177,

I agree that this code snippet should work (I tested it on my machine and it does).

Which version of Sionna RT are you using and on which OS? How was installed?

As a first step, you can try updating Sionna RT to its latest version:

python -m pip install --upgrade sionna-rt