Bug located in starting App

[ak06645]

🔍 Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

🐞 Description of the bug

import ansys.mechanical.core as mech
app = mech.App()

Error:

{
"name": "ValueError",
"message": "Initialized version 241 does not match the expected version None.",
"stack": "---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
Cell In[19], line 2
1 from ansys.mechanical.core import App
----> 2 app = App()
3 app.update_globals(globals())
File c:\Users\fgfsim\Desktop\jan_amit.venv\Lib\site-packages\ansys\mechanical\core\embedding\app.py:133, in App.init(self, db_file, private_appdata, **kwargs)
131 raise Exception("Cannot have more than one embedded mechanical instance!")
132 version = kwargs.get("version")
--> 133 self._version = initializer.initialize(version)
134 configuration = kwargs.get("config", _get_default_addin_configuration())
136 if private_appdata:
File c:\Users\fgfsim\Desktop\jan_amit.venv\Lib\site-packages\ansys\mechanical\core\embedding\initializer.py:171, in initialize(version)
169 if INITIALIZED_VERSION is not None:
170 if INITIALIZED_VERSION != version:
--> 171 raise ValueError(
172 f"Initialized version {INITIALIZED_VERSION} "
173 f"does not match the expected version {version}."
174 )
175 return
177 if version == None:
ValueError: Initialized version 241 does not match the expected version None."
}

I am running this code in vs code in my own python environment. The file to be run is a .ipynb file.

<function ansys.tools.path.path.find_mechanical(version: Optional[float] = None, supported_versions: Dict[int, str] = {251: '2025R1', 242: '2024R2', 241: '2024R1', 232: '2023R2', 231: '2023R1', 222: '2022R2', 221: '2022R1', 212: '2021R2', 211: '2021R1', 202: '2020R2', 201: '2020R1', 195: '19.5', 194: '19.4', 193: '19.3', 192: '19.2', 191: '19.1'}) -> Union[Tuple[str, float], Tuple[Literal[''], Literal['']]]>

This is maybe due to multiple versions of Ansys installation, but even after deleting and reinstalling ansys with just one version this error persist.
Can you suggest what to do?

📝 Steps to reproduce

import ansys.mechanical.core as mech
app = mech.App()

💻 Which operating system are you using?

Windows

📀 Which ANSYS version are you using?

241R1

🐍 Which Python version are you using?

3.12

📦 Installed packages

about-time==4.2.1
aiohappyeyeballs==2.4.0
aiohttp==3.10.5
aiosignal==1.3.1
alive-progress==3.1.5
annotated-types==0.7.0
ansys-acp-core==0.1b1
ansys-additive-core==0.18.1
ansys-additive-widgets==0.2.1
ansys-api-acp==0.1.0.dev9
ansys-api-additive==1.7.2
ansys-api-dbu==0.3.4
ansys-api-dyna==0.3.6
ansys-api-edb==1.0.6
ansys-api-fluent==0.3.27
ansys-api-geometry==0.4.6
ansys-api-mapdl==0.5.2
ansys-api-mechanical==0.1.2
ansys-api-meshing-prime==0.1.3
ansys-api-modelcenter==0.3.1
ansys-api-platform-instancemanagement==1.1.0
ansys-api-pyensight==0.4.1
ansys-api-sherlock==0.1.27
ansys-api-systemcoupling==0.1.0
ansys-api-tools-filetransfer==0.1.0
ansys-api-workbench==0.2.0
ansys-conceptev-core==0.1.4
ansys-dpf-composites==0.5.0
ansys-dpf-core==0.12.2
ansys-dpf-post==0.8.0
ansys-dyna-core==0.4.15
ansys-dynamicreporting-core==0.6.0
ansys-edb-core==0.1.6
ansys-engineeringworkflow-api==0.1.0
ansys-fluent-core==0.22.0
ansys-geometry-core==0.6.6
ansys-grantami-bomanalytics==2.1.1
ansys-grantami-bomanalytics-openapi==3.0.0
ansys-grantami-jobqueue==1.0.1
ansys-grantami-recordlists==1.2.1
ansys-grantami-serverapi-openapi==3.0.0
ansys-hps-client==0.8.0
ansys-mapdl-core==0.68.4
ansys-mapdl-reader==0.54.0
ansys-math-core==0.1.5
ansys-mechanical-core==0.11.5
ansys-mechanical-env==0.1.7
ansys-meshing-prime==0.6.2
ansys-modelcenter-workflow==0.1.1
ansys-motorcad-core==0.5.5
ansys-openapi-common==2.1.1
ansys-optislang-core==0.8.0
ansys-platform-instancemanagement==1.1.2
ansys-pyensight-core==0.8.8
ansys-pythonnet==3.1.0rc3
ansys-rocky-core==0.2.0
ansys-seascape==0.2.0
ansys-sherlock-core==0.6.0
ansys-simai-core==0.2.2
ansys-sound-core==0.1.3
ansys-systemcoupling-core==0.6
ansys-tools-filetransfer==0.1.0
ansys-tools-local-product-launcher==0.1.0
ansys-tools-path==0.6.0
ansys-tools-visualization-interface==0.4.0
ansys-turbogrid-api==0.4.3
ansys-turbogrid-core==0.4.1
ansys-units==0.3.2
ansys-workbench-core==0.6.0
anyio==4.4.0
appdirs==1.4.4
asgiref==3.8.1
asttokens==2.4.1
attrs==24.2.0
backoff==2.2.1
backports.entry-points-selectable==1.3.0
backports.tarfile==1.2.0
bcrypt==4.2.0
beartype==0.18.5
bleach==6.1.0
bokeh==3.4.3
build==1.2.1
cachetools==5.5.0
certifi==2024.7.4
cffi==1.17.0
charset-normalizer==3.3.2
click==8.1.7
clr-loader==0.2.6
colorama==0.4.6
comm==0.2.2
contourpy==1.3.0
cryptography==43.0.0
cycler==0.12.1
debugpy==1.8.5
decorator==5.1.1
defusedxml==0.7.1
Deprecated==1.2.14
dill==0.3.8
Django==5.1
docker==7.1.0
docutils==0.21.2
elementpath==4.4.0
executing==2.0.1
fabric==3.2.2
filelock==3.15.4
flexcache==0.3
flexparser==0.3.1
fonttools==4.53.1
fpdf2==2.7.9
frozenlist==1.4.1
geomdl==5.3.1
google-api-core==2.19.2
google-api-python-client==2.143.0
google-auth==2.34.0
google-auth-httplib2==0.2.0
googleapis-common-protos==1.65.0
grapheme==0.6.0
grpcio==1.65.5
grpcio-health-checking==1.48.2
grpcio-status==1.48.2
h11==0.14.0
httpcore==1.0.5
httplib2==0.22.0
httpx==0.26.0
idna==3.8
importlib_metadata==8.2.0
invoke==2.2.0
ipykernel==6.29.5
ipython==8.26.0
jaraco.classes==3.4.0
jaraco.context==6.0.1
jaraco.functools==4.0.2
jedi==0.19.1
Jinja2==3.1.4
joblib==1.4.2
jsonschema==4.23.0
jsonschema-specifications==2023.12.1
jupyter_client==8.6.2
jupyter_core==5.7.2
keyring==25.3.0
kiwisolver==1.4.5
linkify-it-py==2.0.3
lxml==5.3.0
Markdown==3.7
markdown-it-py==3.0.0
MarkupSafe==2.1.5
marshmallow==3.22.0
marshmallow-oneofschema==3.1.1
matplotlib==3.9.2
matplotlib-inline==0.1.7
mdit-py-plugins==0.4.1
mdurl==0.1.2
more-itertools==10.4.0
msgpack==1.0.8
multidict==6.0.5
nest-asyncio==1.6.0
nh3==0.2.18
nltk==3.9.1
numpy==1.26.4
overrides==7.7.0
packaging==24.1
pandas==2.2.3
panel==1.4.4
param==2.1.1
paramiko==3.4.1
parso==0.8.4
pillow==10.4.0
Pint==0.24.3
pkginfo==1.10.0
platformdirs==4.2.2
plumbum==1.8.3
pooch==1.8.2
prompt_toolkit==3.0.47
proto-plus==1.24.0
protobuf==3.20.3
psutil==6.0.0
pure_eval==0.2.3
pyaedt==0.9.11
pyansys==2024.2.3
pyansys-tools-variableinterop==0.1.1
pyansys-tools-versioning==0.6.0
pyasn1==0.6.0
pyasn1_modules==0.4.0
pycparser==2.22
pydantic==2.8.2
pydantic_core==2.20.1
pyedb==0.23.0
Pygments==2.18.0
pygranta==2024.2.0
pyiges==0.3.1
PyJWT==2.9.0
PyNaCl==1.5.0
pyparsing==3.1.4
pypiwin32==223
pypng==0.20220715.0
pyproject_hooks==1.1.0
Pyro5==5.15
pyspnego==0.11.1
python-dateutil==2.9.0.post0
python-dotenv==1.0.1
pytomlpp==1.0.13
pytwin==0.7.0
pytz==2024.1
pyvista==0.43.4
pyviz_comms==3.0.3
pywin32==306
pywin32-ctypes==0.2.3
PyYAML==6.0.2
pyzmq==26.2.0
readme_renderer==44.0
referencing==0.35.1
regex==2024.7.24
requests==2.32.3
requests-negotiate-sspi==0.5.2
requests-toolbelt==1.0.0
requests_ntlm==1.3.0
rfc3986==2.0.0
rich==13.8.0
rpds-py==0.20.0
rpyc==6.0.0
rsa==4.9
Rtree==1.3.0
scikit-rf==1.2.0
scipy==1.14.1
scooby==0.10.0
semver==3.0.2
serpent==1.41
six==1.16.0
sniffio==1.3.1
sqlparse==0.5.1
sseclient-py==1.8.0
sspilib==0.1.0
stack-data==0.6.3
tabulate==0.9.0
toml==0.10.2
tomli==2.0.1
tornado==6.4.1
tqdm==4.66.5
traitlets==5.14.3
trame==3.6.3
trame-client==3.2.5
trame-server==3.1.0
trame-vtk==2.8.10
trame-vuetify==2.7.0
twine==5.1.1
typing_extensions==4.12.2
tzdata==2024.1
uc-micro-py==1.0.3
uritemplate==4.1.1
urllib3==1.26.19
vtk==9.3.1
wakepy==0.9.1
wcwidth==0.2.13
webencodings==0.5.1
websockets==12.0
WMI==1.5.1
wrapt==1.16.0
wslink==2.1.2
xmlschema==2.5.1
xyzservices==2024.6.0
yarl==1.9.4
zipp==3.20.0

[dipinknair]

@ak06645 Thanks for opening this issue. Could you please do things below and let me know if you are still facing the same issue.

• Update to latest pymechanical pip install ansys-mechanical-core --upgrade
• You can provide the version number of the Mechanical version that you want to use like app=App(version=242). (This is not a solution for the bug you have encountered. If no version is given, then App should find latest version of Mechanical installed). You dont need to uninstall other versions.
• Check if uninstallation of other versions completed successfully.

[ak06645]

Hi Thank you for the quick response:

I already tried this:
from ansys.mechanical.core import App
app = App(version=241)
{
"name": "TypeError",
"message": "int() argument must be a string, a bytes-like object or a real number, not 'NoneType'",
"stack": "---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
Cell In[4], line 3
1 from ansys.mechanical.core import App
----> 3 app = App(version=241)
File c:\Users\fgfsim\Desktop\jan_amit.venv\Lib\site-packages\ansys\mechanical\core\embedding\app.py:142, in App.init(self, db_file, private_appdata, **kwargs)
139 profile.update_environment(os.environ)
140 atexit.register(_cleanup_private_appdata, profile)
--> 142 self._app = _start_application(configuration, self._version, db_file)
143 runtime.initialize(self._version)
144 connect_warnings(self)
File c:\Users\fgfsim\Desktop\jan_amit.venv\Lib\site-packages\ansys\mechanical\core\embedding\app.py:78, in _start_application(configuration, version, db_file)
75 addin_configuration_name = configuration.addin_configuration
76 # Starting with version 241 we can pass a configuration name to the constructor
77 # of Application
---> 78 if int(version) >= 241:
79 return Ansys.Mechanical.Embedding.Application(db_file, addin_configuration_name)
80 else:
TypeError: int() argument must be a string, a bytes-like object or a real number, not 'NoneType'"
}

I will try to clean all related versions again and upgrade ansys-mechanical-core.