Dear developers:

I'm calculating the exciton dispersion of a 2D honeycomb lattice material. I first calculated the dispersion along Gamma-K and Gamma-M paths with:
iqmtrange="1 5"
<qpointset>
<qpoint>0.0000000 0.0000000 0.0000000</qpoint>
<qpoint>0.0833333 0.0833333 0.0000000</qpoint>
<qpoint>0.1666667 0.1666667 0.0000000</qpoint>
<qpoint>0.2500000 0.2500000 0.0000000</qpoint>
<qpoint>0.3333333 0.3333333 0.0000000</qpoint>
</qpointset>
and
iqmtrange="1 6"
<qpointset>
<qpoint>0.0000000 0.0000000 0.0000000</qpoint>
<qpoint>0.0000000 0.1000000 0.0000000</qpoint>
<qpoint>0.0000000 0.2000000 0.0000000</qpoint>
<qpoint>0.0000000 0.3000000 0.0000000</qpoint>
<qpoint>0.0000000 0.4000000 0.0000000</qpoint>
<qpoint>0.0000000 0.5000000 0.0000000</qpoint>
</qpointset>
all the two runs are finished successfully and give reasonable results. However, when I turned the the K-M path with
iqmtrange="1 5"
<qpointset>
<qpoint>0.3333333 0.3333333 0.0000000</qpoint>
<qpoint>0.2500000 0.3750000 0.0000000</qpoint>
<qpoint>0.1666667 0.4166667 0.0000000</qpoint>
<qpoint>0.0833333 0.4583333 0.0000000</qpoint>
<qpoint>0.0000000 0.5000000 0.0000000</qpoint>
</qpointset>
I found that the job can not even start, i.e., it directly exits with INFOXS.OUT file containing only a title

| EXCITING NITROGEN started for task xsgeneigvec (301) =
| version hash id: =
| MPI version using 24 processor(s) =
| | using MPI-2 features =
| =
| Date (DD-MM-YYYY) : 18-05-2019 =

But, if I arbitrarily include Gamma point (0,0,0) in qpointset
iqmtrange="1 6"
<qpointset>
<qpoint>0.0000000 0.0000000 0.0000000</qpoint>
<qpoint>0.3333333 0.3333333 0.0000000</qpoint>
<qpoint>0.2500000 0.3750000 0.0000000</qpoint>
<qpoint>0.1666667 0.4166667 0.0000000</qpoint>
<qpoint>0.0833333 0.4583333 0.0000000</qpoint>
<qpoint>0.0000000 0.5000000 0.0000000</qpoint>
</qpointset>
then everything seems to go right.

(of course, I used the same value for other parameters in all the tree calculations above)

I really want to know whether this is normal for exciting. Or did I do something wrong?

Thanks very much for your help~

Zeyu Jiang
PhD Student
Department of Physics, Tsinghua University