Hi @Poornima_Jain thanks for reaching out! We are in the process of updating autograd formulas to work properly for complex (example PR: https://github.com/pytorch/pytorch/pull/43208) We are hoping to have complex autograd in beta in 1.8 release. You can check https://github.com/pytorch/pytorch/issues/33152 to see what’s being worked on for complex and add comments if you specifically need backward support for certain operators. Thank you!