LoadLibrary Failed with Error 126 When Loading onnxruntime_providers_openvino.dll

[DavidLuong98]

Issue: LoadLibrary Failed with Error 126 When Loading onnxruntime_providers_openvino.dll

Description:
I'm encountering the following error when trying to load and run inferences with the provider OpenVINOExecutionProvider.

2025-01-28 20:44:54.4135662 [E:onnxruntime:, inference_session.cc:1999 onnxruntime::InferenceSession::Initialize] Conflicting session configuration: explicitly added the CPU EP to the session, but also disabled fallback to the CPU EP via session configuration options.
Traceback (most recent call last):
  File "C:\Users\luongdavid\project\.venv\Lib\site-packages\onnxruntime\capi\onnxruntime_inference_collection.py", line 465, in __init__
    self._create_inference_session(providers, provider_options, disabled_optimizers)
  File "C:\Users\luongdavid\project\.venv\Lib\site-packages\onnxruntime\capi\onnxruntime_inference_collection.py", line 537, in _create_inference_session
    sess.initialize_session(providers, provider_options, disabled_optimizers)
RuntimeError: C:\Users\Administrator\Desktop\windows_perf\release_validation_1.20.0\final_build\onnxruntime\onnxruntime\core\session\provider_bridge_ort.cc:1539 onnxruntime::ProviderLibrary::Get [ONNXRuntimeError] : 1 : FAIL : LoadLibrary failed with error 126 "" when trying to load "C:\Users\luongdavid\project\\.venv\Lib\site-packages\onnxruntime\capi\onnxruntime_providers_openvino.dll"


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Users\luongdavid\project\scripts\wse\openvino.py", line 14, in <module>
    provider = ort.InferenceSession(model_path,
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luongdavid\project\onnxruntime_inference_collection.py", line 478, in __init__
    raise fallback_error from e
  File "C:\Users\luongdavid\project\.venv\Lib\site-packages\onnxruntime\capi\onnxruntime_inference_collection.py", line 473, in __init__
    self._create_inference_session(self._fallback_providers, None)
  File "C:\Users\luongdavid\project\\.venv\Lib\site-packages\onnxruntime\capi\onnxruntime_inference_collection.py", line 537, in _create_inference_session
    sess.initialize_session(providers, provider_options, disabled_optimizers)
onnxruntime.capi.onnxruntime_pybind11_state.InvalidArgument: [ONNXRuntimeError] : 2 : INVALID_ARGUMENT : Conflicting session configuration: explicitly added the CPU EP to the session, but also disabled fallback to the CPU EP via session configuration options

Steps to Reproduce:

1. Set up a virtual environment with the following:
   • onnxruntime installed.
   • openvino providers enabled.
2. Attempt to run a Python script that uses ONNX Runtime with OpenVINO support.
3. Receive the error message:

*************** EP Error ***************
EP Error C:\Users\Administrator\Desktop\windows_perf\release_validation_1.20.0\final_build\onnxruntime\onnxruntime\core\session\provider_bridge_ort.cc:1539 onnxruntime::ProviderLibrary::Get [ONNXRuntimeError] : 1 : FAIL : LoadLibrary failed with error 126 "" when trying to load "C:\Users\luongdavid\project\.venv\Lib\site-packages\onnxruntime\capi\onnxruntime_providers_openvino.dll"

I have also followed the steps : https://onnxruntime.ai/docs/execution-providers/OpenVINO-ExecutionProvider.html and saved the environment variables by running C:\ <openvino_install_directory>\setupvars.bat (however no environment variables were actually created).

Environment:

• OS:Windows
• Python Version:3.11
• onnxruntime Version: 1.20.1
• openvino Version: 2024.6.0

I have also verified that the available providers are present :
available providers ['OpenVINOExecutionProvider', 'CPUExecutionProvider']

Has anyone else experienced this issue or have suggestions for resolving it? Any guidance would be appreciated!