ANSYS Mechanical Enterprise中右键Harmonic Response(B5)求解后出现如下警告，且Solution(B6)无法显示结果，后续单单独对Solution(B6)求解，出现Warning: Since the result file dose not indicate the unit system, the following file unit system is assumed: Metric(mm,kg,N,s,mV,mA)，仍无法获得仿真结果，这是怎么回事啊？