ansoft  hfss 求解问题

按HFSS---Analyze  All 运行仿真分析时报错
Project4 (C:/Documents and Settings/Administrator/My Documents/Ansoft/)
  HFSSDesign1
    [error] Initial mesh, process mesh3d : Error while opening or writing the mesh files. (9:41 下午  十二月 21, 2011)
    [error] Simulation completed with execution error on server: Local Machine. (9:41 下午  十二月 21, 2011)
不知是什么原因，请高手指教，不胜感激。