网格预览是出了这样的问题,请大家帮我看看这是怎么回事:Previewing...<BR>Updating mesh to time 1.00000e-04 (step = 00001) <BR>Warning: multiple subdivision required on zone 4.<BR>Error: Internal error at line 1595 in file 'grid.c'.<BR>replace_c_in_f: cell not found<BR>Error Object: () <BR><BR>