Torch.save() pytorch runtimeerror: could not allocate bytes object!

During the training of the model, there was no problem with torch.save() for the previous several times, but I suddenly encountered this problem [runtimeerror: could not allocate bytes object!]. What is the reason for this and how to solve it?

Maybe you are running out of memory?
Could you post a minimal, executable code snippet to reproduce this issue, please?