Error when running the last step wann2j

[ChenqiangHua]

Reading atomic structure from file ./POSCAR.
Reading Wannier90 hamiltonian: spin up.
Reading Wannier90 hamiltonian: spin down.
Starting to calculate exchange.

Traceback (most recent call last):
File "/beegfs/home/b00004/anaconda3/bin/wann2J.py", line 186, in
run_wann2J()
File "/beegfs/home/b00004/anaconda3/bin/wann2J.py", line 156, in run_wann2J
gen_exchange(path=args.path,
File "/beegfs/home/b00004/anaconda3/lib/python3.9/site-packages/TB2J/manager.py", line 98, in gen_exchange
exchange = ExchangeCL2(tbmodels=(tbmodel_up, tbmodel_dn),
File "/beegfs/home/b00004/anaconda3/lib/python3.9/site-packages/TB2J/exchange.py", line 72, in init
self.set_tbmodels(tbmodels)
File "/beegfs/home/b00004/anaconda3/lib/python3.9/site-packages/TB2J/exchangeCL2.py", line 30, in set_tbmodels
self.Gup = TBGreen(self.tbmodel_up,
File "/beegfs/home/b00004/anaconda3/lib/python3.9/site-packages/TB2J/green.py", line 92, in init
self._prepare_eigen()
File "/beegfs/home/b00004/anaconda3/lib/python3.9/site-packages/TB2J/green.py", line 156, in _prepare_eigen
self.evals, self.evecs = self._reduce_eigens(self.evals,
File "/beegfs/home/b00004/anaconda3/lib/python3.9/site-packages/TB2J/green.py", line 98, in _reduce_eigens
istart, iend = ts[0], ts[-1] + 1
IndexError: index 0 is out of bounds for axis 0 with size 0

I use similar structure, i have succussfully got the results. but at this time sth wrong

[ChenqiangHua]

pleause help me. or tell me somewhere maybe wrong? the wannierise process is succussful

the command I used is like this:
wann2J.py --efermi -0.2822 --kmesh 5 5 1 --elements Fe --prefix_up wannier90.up --prefix_down wannier90.dn --emin -10.0 --emax 0.0

Thanks!

[mailhexu]

Hi,
The error message shows that TB2J doesn't find any band in the energy range speicified by the efermi, emin and emax. Maybe these options are not correctly given, or the Wannier Hamitonian is wrong. Could you check the Wannier90 band structure, and the fermi energy.
Best wishes,
HeXu

[ChenqiangHua]

Much thanks! let me try ,maybe sth wrong in my wannier calculation or projection!

thanks again!