Error when running a python file from matlab

Hi, I have a python file (Test.py) that shall be executed from a matlab file (Test_Matlab.m), both are in the same directory. In my matlab file I use "pyrunfile("Test.py")" to run the python file. The python file shall thereby open the program Dlubal RSTAB, create a new model and add a node in there (code thereof is attached at the end). However it doesnt work, I get the error "Python Error: ModuleNotFoundError: No module named 'dlubal'". When I run the python file directly it works without any problem, so I dont know what I do wrong. Thanks for a help (I use Matlab R2026a and Python 3.13.2).

Test.py Code:

from dlubal.api import rstab

# Option 1: Specify API key directly as a parameter

with rstab.Application(api_key_value="ak-92d9ffcc70bc4049a...", url="localhost", port=9000) as rstab_app:

print(rstab_app.get_application_info())

#Offene Modelle schließen

rstab_app.close_all_models(save_changes=False)

#Neues Modell anlegen

rstab_app.create_model(name="Test")

#Knoten definieren

my_node=rstab.structure_core.Node(

no=48,

coordinate_1=1.0,

coordinate_2=0.5,

coordinate_3=-2.0

)

#Knoten erzeugen

rstab_app.create_object(my_node)