Question: RuntimeError: Tensors must have same number of dimensions: got 2 and 3

[RealNicolasBourbaki]

I am using TransformerConv and encountered this error:

Traceback (most recent call last):

File "pipeline_model_gat.py", line 1018, in <module>
output = model( 
File"/mount/arbeitsdaten61/studenten3/advanced-ml/2022/gogirlspower/nicole/conda/envs/new_gvqa/lib/python3.8/sitepackages/torch/nn/modules/module.py", line 727, in _call_impl
result = self.forward(*input, **kwargs)
File "pipeline_model_gat.py", line 881, in forwardquestions_encoded = self.question_encoder(question_graphs)  
File "/mount/arbeitsdaten61/studenten3/advanced-ml/2022/gogirlspower/nicole/conda/envs/new_gvqa/lib/python3.8/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
result = self.forward(*input, **kwargs)
File "pipeline_model_gat.py", line 628, in forward= self.conv1(x, question_graphs.edge_index, edge_attr)  
File "/mount/arbeitsdaten61/studenten3/advanced-ml/2022/gogirlspower/nicole/conda/envs/new_gvqa/lib/python3.8/site-packages/torch/nn/modules/module.py", line 727, in _call_impl
result = self.forward(*input, **kwargs) 
File "/mount/arbeitsdaten61/studenten3/advanced-ml/2022/gogirlspower/nicole/conda/envs/new_gvqa/lib/python3.8/site-packages/torch_geometric/nn/conv/transformer_conv.py", line 190, in forward
beta = self.lin_beta(torch.cat([out, x_r, out - x_r], dim=-1))
RuntimeError: Tensors must have same number of dimensions: got 2 and 3 

Can someone please tell me what could have gone wrong?

[Padarn]

Do you mind providing a reproducible example?