[Wien] [WIEN]how to mark the vacancy atom in struct file?

[白宇]

Dear wien users:
  I am trying to do vacancy caculation. But i don't know how to mark the vacancy position in struct file. I try to mark it as a Z=0 atom, but keep its position coordinators,then lstart program always run error. However, if i don't mark it in the struct file, I don't know how to caculate the vacancy DOS.
  Hope experienced user help me sovle this tiny problem.
  Thank you.