Run DFT Calculations (e.g., with VASP):Ensure sufficient unoccupied states are included.
Generate Wannier Functions:Create a wannier90.win file. Run Wannier90:bashwannier90.x your_system_name
Set Up Optical Properties Calculation: Modify wannier90.win to include:textberry_task = kubo
Run Post-Processing: Execute:bashpostw90.x your_system_name .. I Have followed these steps but i dont know why this postw90.x is not working for me ... version of wannier that i am using supports Kubo and Berry,which i have checked...However after running my command neither optical property files are generated nor do i receieve any error .
