QNN EP Sample - Fresh build with latest official QNN package produces errors on ARM64 Snapdragon QC PC

I used official latest ORT 1.20 pre-built package per https://onnxruntime.ai/docs/execution-providers/QNN-ExecutionProvider.html#pre-built-packages-windows-only

It looks to use QNN_2.27.0.240926142112_100894

After build and execute, some of the executions will produce error messages or crash

run_qnn_ep_sample.bat C:\Users\ivberg\Downloads\microsoft.ml.onnxruntime.qnn.1.20.0\build\native C:\Users\ivberg\Downloads\microsoft.ml.onnxruntime.qnn.1.20.0\runtimes\win-arm64\native

// Error 1

REM TODO Check for mobilenetv2-12_quant_shape.onnx_ctx.onnx

Error in cpuinfo: Unknown chip model name 'snapdragon (tm) 8cx gen 3 @ 3.40 GHz'.
Please add new Windows on Arm SoC/chip support to arm/windows/init.c!
unknown Qualcomm CPU part 0x1 ignored
...
2024-11-08 13:02:36.8328541 [E:onnxruntime:, onnx_ctx_model_helper.cc:162 onnxruntime::qnn::LoadQnnCtxFromOnnxGraph] Failed to load from EpContext model. qnn_backend_manager.cc:636 onnxruntime::qnn::QnnBackendManager::LoadCachedQnnContextFromBuffer Failed to get context binary info.
Exception in run_ort_qnn_ep: Failed to load from EpContext model. qnn_backend_manager.cc:636 onnxruntime::qnn::QnnBackendManager::LoadCachedQnnContextFromBuffer Failed to get context binary info.

// Error 2

REM run mobilenetv2-12_net_qnn_ctx.onnx (generated from native QNN) with QNN HTP backend

s:\src\onnxruntime-inference-examples\c_cxx\QNN_EP\mobilenetv2_classification\build\Release>qnn_ep_sample.exe --qnn mobilenetv2-12_net_qnn_ctx.onnx kitten_input_nhwc.raw
Exception in run_ort_qnn_ep:

The other combo of runs work fine

Start with run_qnn_ep_sample.bat and qnn_ep_sample.exe, reproducing the two reported failures on the ARM64 Snapdragon system. Read arm/windows/init.c alongside the QNN sample paths and the reported EpContext errors. Done means the affected executions no longer error or crash while the combinations already reported as working remain successful.