About "max_unpool2d" function

[ChenFan666]

When i use another backbone , i meet this problem：

I cheak the conv5_3.shape and id4.shape , they meet the requirements of the "max_unpool2d" function

Could you help me?please!

[Pongpisit-Thanasutives]

Based on the error message, casting the type of elements in id4 to be torch.int64 may solve the problem.

Like this ...
id4 = id4.type(torch.int64)

[ChenFan666]

Thank you for your explanation, but after I made the modification, the following problems occurred

This is their shape：

I see this tensor have the same channel in your code, and i make my tensor's channel to same, but still report error

[ChenFan666]

This my fault, i not use the maxpool,just want use the unmaxpool,thank you very much!

[Pongpisit-Thanasutives]

That's fine. The max_unpool is used together with the max_pooling operation.
You may see https://pytorch.org/docs/stable/generated/torch.nn.MaxUnpool2d.html.
And, the indices should be positive integers.