Quartus 7.2仿真时出现了以下者个提示，请问该怎么解决啊

kscc0202121

之前的时候还没有，但不知啥时候就跳出来以下这个东东啦。 Info: Option to preserve fewer signal transitions to reduce memory requirements is enabled Info: Simulation has been partitioned into sub-simulations according to the maximum transition count determined by the engine. Transitions from memory will be flushed out to disk at the end of each sub-simulation to reduce memory requirements. 随后，方针速度就变得超慢。 在设置里把参数 修改为OFF 后，还是超慢，真是纠结！！！ 望大虾们赐教！！！