hfss仿真出現(xiàn)的小問(wèn)題

[warning] HFSSDesign1: Solutions have been invalidated. Undo to recover. (2:41 下午  四月 09, 2009)
    [info] Normal completion of simulation on server: Local Machine. (2:45 下午  四月 09, 2009)
    仿真出現(xiàn)這種問(wèn)題，做的結(jié)果會(huì)有偏差嗎？那個(gè)warning的出現(xiàn)是什么原因�。磕芊翊笾抡f(shuō)明一下，謝謝啦。