System.Runtime.InteropServices.SEHException : External component has thrown an exception

[frank-dong-ms-zz]

Hi there, our team (ML.NET) is using tensorflow.NET and we are seeing below exception in some cases which is rare case and not easy to reproduce in local env:

Error Message:
System.Runtime.InteropServices.SEHException : External component has thrown an exception.
Stack Trace:
at Tensorflow.c_api.TF_SessionRun(IntPtr session, TF_Buffer* run_options, TF_Output[] inputs, IntPtr[] input_values, Int32 ninputs, TF_Output[] outputs, IntPtr[] output_values, Int32 noutputs, IntPtr[] target_opers, Int32 ntargets, IntPtr run_metadata, IntPtr status)
at Microsoft.ML.TensorFlow.TensorFlowUtils.Runner.Run() in D:\a\1\s\src\Microsoft.ML.TensorFlow\TensorflowUtils.cs:line 491
at ...

Code:
https://github.com/frank-dong-ms/machinelearning/blob/dd0faef7c6fd12b498ef9fb15ec8378650bc551b/src/Microsoft.ML.TensorFlow/TensorflowUtils.cs#L491

I'm wondering is there a way to get exception details like error message and call stack so we can investigate further?

[Oceania2018]

I can’t tell from the limited information. It has nothing to do with TF.NET, because you use your own runner that is calling c_api directly. Unfortunately, it will be hard to debug.

[frank-dong-ms-zz]

Yes, we are using c_api directly, is there any way to catch detailed exception?

[Oceania2018]

You can check the _status first.

[frank-dong-ms-zz]

Thanks, let me have a try

[Nucs]

Seems to be an exception thrown from C++, likely to be TF's.

1. Checking the TF.NET's Tensorflow.Status for more details (from props: status.Message and Message.Code).
2. System.Runtime.InteropServices.SEHException has an ErrorCode property, its value might give some insights.