CUDA Version Issues: RegularNetwork::Launch and linalg::Trace Errors

[Chan-Sing-Hong]

I encountered two errors while using the Cytnx CUDA version 1.0.0:

1. RegularNetwork::Launch Error

RuntimeError: 
# Cytnx error occur at virtual cytnx::UniTensor cytnx::RegularNetwork::Launch()
# error: [ERROR][Launch][RegularNetwork] Error,Sparse or Block type UniTensor network contraction is not support.

Issue: Sparse or Block-type UniTensor network contraction is not supported in the CUDA version.

2. linalg::Trace Error

RuntimeError:
Cytnx error occur at cytnx::Tensor cytnx::linalg::Trace(const cytnx::Tensor&, const cytnx::cytnx_uint64&, const cytnx::cytnx_uint64&)
error: [ERROR][Trace] GPU is under developing.

Issue: The Trace function cannot be implemented for GPU.

Are there any temporary solutions for these issues?

[IvanaGyro]

Maybe move the network onto the CPU and try to call these functions on the CPU?

[Chan-Sing-Hong]

Yes, that is one way to do it, but I am wondering if there is a way to handle it directly in CUDA.

[manuschneider]

Trace is being implemented in #749.
RegularNetwork with cuquantum currently supports dense UniTensors only (without cuquantum it is implemented).

[manuschneider]

RegularNetwork.Launch() is implemented in #750
Please check if everything works now.