EMIT Designs fail to launch correctly with 0.18 and 0.19

[JonathonMcMullan]

Hi,
I've downloaded the Antenna EMIT Jupyter Notebook example and also created my own simple example but upon launching the EMIT design, the init method generates an error:

1 project_name = ansys.aedt.core.generate_unique_project_name(
      2     root_name=temp_folder.name, project_name="antenna_cosite"
      3 )
      4 d = ansys.aedt.core.launch_desktop(AEDT_VERSION, NG_MODE, new_desktop=True)
----> [5](vscode-notebook-cell:?execution_count=4&line=5) aedtapp = ansys.aedt.core.Emit(project_name, version=AEDT_VERSION)

TypeError: __init__() should return None, not 'bool'

The design itself looks to be created correctly in the GUI (blank EMIT design with the right version/project path and no contents etc.) but it generates this error at the end. I've tested with AEDT 2025.2/Python 3.12.1 and PyAEDT 0.18 and 0.19, native python and Jupyter Notebook, and all give the same error from the init method. Is there a workaround for this?

Thanks,
Jonathon

[JonathonMcMullan]

As a follow up, it might be a hardcoded version issue somewhere in the library but I'm not sure:

PyAEDT INFO: Importing EmitApiPython from: [C:\Program](file:///C:/Program) Files\ANSYS Inc\v252\AnsysEM\Delcross\EmitApiPython\__init__.py
PyAEDT ERROR: **************************************************************
PyAEDT ERROR:   File "<frozen runpy>", line 198, in _run_module_as_main
PyAEDT ERROR:   File "<frozen runpy>", line 88, in _run_code
PyAEDT ERROR:   File "c:\Program Files\Python312\Lib\asyncio\base_events.py", line 645, in run_forever
PyAEDT ERROR:     self._run_once()
PyAEDT ERROR:   File "c:\Program Files\Python312\Lib\asyncio\base_events.py", line 1999, in _run_once
PyAEDT ERROR:     handle._run()
PyAEDT ERROR:   File "c:\Program Files\Python312\Lib\asyncio\events.py", line 88, in _run
PyAEDT ERROR:     self._context.run(self._callback, *self._args)
PyAEDT ERROR:   File "C:\Users\Jonathon.McMullan\AppData\Local\Temp\ipykernel_31648\2220578924.py", line 1, in <module>
PyAEDT ERROR:     emitapp = pyaedt.Emit(project=project_path, version=aedt_version, non_graphical=ng_mode)
PyAEDT ERROR:   File "c:\Program Files\Python312\Lib\importlib\__init__.py", line 90, in import_module
PyAEDT ERROR:     return _bootstrap._gcd_import(name[level:], package, level)
PyAEDT ERROR:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
PyAEDT ERROR:   File "<frozen importlib._bootstrap_external>", line 999, in exec_module
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
PyAEDT ERROR:   File "C:\Program Files\ANSYS Inc\v252\AnsysEM\Delcross\EmitApiPython\__init__.py", line 14, in <module>
PyAEDT ERROR:     EmitApiPython = importlib.import_module(emit_api_pyd)
PyAEDT ERROR:                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
PyAEDT ERROR:   File "c:\Program Files\Python312\Lib\importlib\__init__.py", line 90, in import_module
PyAEDT ERROR:     return _bootstrap._gcd_import(name[level:], package, level)
PyAEDT ERROR:            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
PyAEDT ERROR:   File "<frozen importlib._bootstrap>", line 1324, in _find_and_load_unlocked
PyAEDT ERROR: No module named 'emitapipython312' on __init__
PyAEDT ERROR: Last Electronics Desktop Message - [error] no module named 'emitapipython312' on __init__

Testing with 2025.1/Python 3.12.1/PyAEDT 0.19 and the same script launches correctly

[jsalant22]

@JonathonMcMullan If you require Python 3.12, we can provide a fix for this issue.

[JonathonMcMullan]

@jsalant22 If it wasn't too much trouble then that would be very helpful, thanks!

[jsalant22]

EmitApiPython312.zip
@JonathonMcMullan Try adding these 2 files to the Delcross folder of the installation (usually, C:\Program Files\ANSYS Inc\v261\AnsysEM\Delcross)

[JonathonMcMullan]

@jsalant22 thanks very much, this worked perfectly

[Samuelopez-ansys]

Hi @JonathonMcMullan ,

EMIT API has a limitation, it only works for Python 3.10. In future AEDT releases other python versions will be added. @jsalant22

please try with 3.10

[JonathonMcMullan]

Hi @Samuelopez-ansys, thanks I'll try that