Dear Zahra, Try to review the coordinates of the K high symmetry point in the block BanddLine
BandLinesScale pi/a # Default Value %block BandLines 1 1.1547 0.0000 0.0000 \M 300 0.0000 0.0000 0.0000 \Gamma 300 0.0000 1.3333 0.0000 \K ****************** 300 1.1547 0.0000 0.0000 \M %endblock BandLines BandLinesScale pi/a %block BandLines 1 1.1547005 0.000 0.000 M 35 0.0000000 0.000 0.000 \Gamma 35 1.1547005 0.666666667 0.000 K 20 1.1547005 0.000 0.000 M %endblock BandLines