优化构建的金属团簇时CASTEP报错，求解决

从头开始搞计算

Warning: There are no empty bands for at least one kpoint and spin; this may
          slow the convergence and/or lead to an inaccurate groundstate.
          If this warning persists, you should consider increasing nextra_bands
          and/or reducing smearing_width in the param file.
          Recommend using nextra_bands of 30 to 37.