Working on Windows with Pytorch 1.9.1+cu102
I have an object detector that runs with a Torchvision FP32 ResNet-18 backbone.
Added QuantStub and DequantStub to my model, calling the quant stub on the input and the dequant stub on the output (in the model’s forward method)
Quantized the model using fbgemm

When the ResNet model tries to perform out += identity (From Torchvision implementation, BasicBlock class), I get the following error:
File "d:\anaconda3\lib\site-packages\torchvision\models\resnet.py", line 80, in forward
    out += identity
NotImplementedError: Could not run 'aten::add.out' with arguments from the 'QuantizedCPU' backend. This could be because the operator doesn't exist for this backend, or was omitted during the selective/custom build process (if using custom build). If you are a Facebook employee using PyTorch on mobile, please visit https://fburl.com/ptmfixes for possible resolutions. 'aten::add.out' is only available for these backends: [CPU, CUDA, Meta, MkldnnCPU, SparseCPU, SparseCUDA, SparseCsrCPU, BackendSelect, Named, ADInplaceOrView, AutogradOther, AutogradCPU, AutogradCUDA, AutogradXLA, UNKNOWN_TENSOR_TYPE_ID, AutogradMLC, AutogradHPU, AutogradNestedTensor, AutogradPrivateUse1, AutogradPrivateUse2, AutogradPrivateUse3, Tracer, Autocast, Batched, VmapMode].

How can I overcome it?