Failure to convert torch.nn.functional.grid_sample to TensorRT engine


After debugging my network, I found the line which prevents it from being converted to TensorRT engine is a line which uses a ‘grid sample’ object:


After exporting the onnx and sanitising it, I run trtexec but I get the error:

No importer registered for op: GridSample. Attempting to import as plugin.

What is the solution please?

Link to model:


TensorRT Version:
GPU Type: RTX 3080
Nvidia Driver Version:
CUDA Version: 11.6
CUDNN Version:
Operating System + Version: Windows 10
Python Version (if applicable):
TensorFlow Version (if applicable): 3.10.8
PyTorch Version (if applicable): 1.12.1
Baremetal or Container (if container which image + tag):

Relevant Files

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Steps To Reproduce

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  • Exact steps/commands to run your repro
  • Full traceback of errors encountered


Could you please check the opset version you’re using while exporting the ONNX model.
Please make sure you are using the latest Opset version 17 and try again.
If you still face the issue, please share with us the ONNX model and complete verbose logs.

Thank you.


I just exported the onnx again using opset v. 17. After sanitising it, if I attempt to convert it to a trt engine, it gives this error:

[05/26/2023-11:24:09] [I] [TRT] No importer registered for op: GridSample. Attempting to import as plugin.
[05/26/2023-11:24:09] [I] [TRT] Searching for plugin: GridSample, plugin_version: 1, plugin_namespace:
[05/26/2023-11:24:09] [E] [TRT] ModelImporter.cpp:773: While parsing node number 875 [GridSample -> "/GridSample_output_0"]:
[05/26/2023-11:24:09] [E] [TRT] ModelImporter.cpp:774: --- Begin node ---
[05/26/2023-11:24:09] [E] [TRT] ModelImporter.cpp:775: input: "/Reshape_99_output_0"
input: "/Concat_98_output_0"
output: "/GridSample_output_0"
name: "/GridSample"
op_type: "GridSample"
attribute {
  name: "align_corners"
  i: 1
  type: INT
attribute {
  name: "mode"
  s: "bilinear"
  type: STRING
attribute {
  name: "padding_mode"
  s: "zeros"
  type: STRING

[05/26/2023-11:24:09] [E] [TRT] ModelImporter.cpp:776: --- End node ---
[05/26/2023-11:24:09] [E] [TRT] ModelImporter.cpp:779: ERROR: builtin_op_importers.cpp:4890 In function importFallbackPluginImporter:
[8] Assertion failed: creator && "Plugin not found, are the plugin name, version, and namespace correct?"
[05/26/2023-11:24:09] [E] Failed to parse onnx file
[05/26/2023-11:24:09] [I] Finished parsing network model. Parse time: 8.25613
[05/26/2023-11:24:09] [E] Parsing model failed
[05/26/2023-11:24:09] [E] Failed to create engine from model or file.
[05/26/2023-11:24:09] [E] Engine set up failed
&&&& FAILED TensorRT.trtexec [TensorRT v8601] # trtexec.exe --onnx=IGCV_san.onnx --saveEngine=IGCV_san.trt

Here is the onnx model exported with opset v. 17:


We could successfully build the engine on TensorRT 8.6.

[05/30/2023-07:53:17] [I]
&&&& PASSED TensorRT.trtexec [TensorRT v8601] # trtexec --onnx=model.onnx --verbose 

Are you facing this issue only on windows ?

Thank you.

Thanks. Yes I’m using Windows.

Good Morning,

If this is an identified issue on Windows, is there an upcoming fix please?



Could you please reinstall TensorRT and try again to make sure the TensorRT libraries are correctly installed.

Please share with us the complete verbose logs if you face the issue again.

Thank you.