ONNX Runtime ONNXRuntimeError: [ONNXRuntimeError] : 22 : FAIL : Invalid session options

What is ONNX Runtime ONNXRuntimeError: [ONNXRuntimeError] : 22 : FAIL : Invalid session options

Understanding ONNX Runtime

ONNX Runtime is a high-performance inference engine for machine learning models in the Open Neural Network Exchange (ONNX) format. It is designed to accelerate the deployment of machine learning models across a variety of platforms and devices. ONNX Runtime supports a wide range of hardware and provides optimizations to improve the performance of model inference.

Identifying the Symptom

When using ONNX Runtime, you might encounter the following error message:

ONNXRuntimeError: [ONNXRuntimeError] : 22 : FAIL : Invalid session options

This error indicates that there is an issue with the session options provided to the ONNX Runtime session.

What You Observe

The error typically occurs when initializing a session with ONNX Runtime. It prevents the successful creation of a session, thereby halting any further inference operations.

Explaining the Issue

The error code 22 : FAIL : Invalid session options suggests that the session options passed to the ONNX Runtime session are either incorrect or unsupported. Session options are used to configure various settings for the inference session, such as execution providers, optimization levels, and logging.

Common Causes

Using deprecated or unsupported session options. Incorrectly formatted session options. Typographical errors in the session options.

Steps to Fix the Issue

To resolve this issue, follow these steps:

Step 1: Review the Documentation

Ensure that you are using valid session options by reviewing the ONNX Runtime documentation. This documentation provides a comprehensive list of supported session options and their correct usage.

Step 2: Validate Session Options

Check the session options in your code for any typographical errors or unsupported settings. Here is an example of how to correctly set session options:

import onnxruntime as ortsession_options = ort.SessionOptions()session_options.intra_op_num_threads = 1session_options.execution_mode = ort.ExecutionMode.ORT_SEQUENTIAL

Ensure that each option is set according to the documentation.

Step 3: Update ONNX Runtime

If you are using an older version of ONNX Runtime, consider updating to the latest version. Newer versions may have updated or deprecated certain session options. You can update ONNX Runtime using pip:

pip install --upgrade onnxruntime

Step 4: Test the Configuration

After making the necessary changes, test your configuration by initializing the session again. If the error persists, double-check the session options and refer to the ONNX Runtime GitHub repository for further guidance or to report issues.

Conclusion

By ensuring that your session options are valid and supported, you can resolve the "Invalid session options" error in ONNX Runtime. Always refer to the official documentation for the most accurate and up-to-date information on configuring ONNX Runtime sessions.