2008版一個(gè)時(shí)域求解錯(cuò)誤

先是一個(gè)警告：
The current settings will probably lead to a very long simulation time.
You may improve the simulation speed by:
1.checking the frequency range and units settings
2.extending the simulation frequency range
3.checking the mesh to avoid very small mesh steps
然后是這個(gè)錯(cuò)誤：
Calculation is aborted due to port memory exception. Please reduce number of ports or simulation duration
不知道這是什么原因引起的？
我算的諧振腔，當(dāng)頻率范圍2.7~3G時(shí)不出現(xiàn)上面的警告和錯(cuò)誤
而當(dāng)我減小頻率范圍時(shí)就會(huì)出現(xiàn)上面的警告和錯(cuò)誤，為什么時(shí)域求解時(shí)，頻率范圍小會(huì)增加仿真時(shí)間？
不知道這個(gè)跟2008版里新增的adaptive port meshing功能是否相關(guān)？
謝謝！