VERY BAD NEWS! internal error in subroutine IBZKPT:

 Reciprocal lattice and k-lattice belong todifferent class of lattices. Often results are still useful...    168

The messagedoes not mean an error. (Computaion is till reliable) The proceduredoing the evaluation of symmetry uses a numerical criterion(SYMPREC=1E-5, the default value) to determinewhich atoms are symmetrically equivalent. When this criterion istoo soft theprogramm can find "false" symmetry and reports that "reciprocallattice and k-lattice belong to differentclass of lattices." Such message can be removed by setting:
1) Switchoff the symmetry (ISYM=0) (Sometimes doesnot work well!)
2) Make thetreshold for detecting the symmetry more severe(SYMPREC=1E-8)

June 16th, 2020