求助：ANSYS14.0里处理结果出现这个Elements with unsymmetric ? 225

用ANSYS14.0做模态分析，出现error：Elements with unsymmetric matrices must use the unsymmetric eigensolver <MODOPT,UNSYMM command> or the damped eigensolver <MODOPT,DAMP command>

怎么解决啊？着急，求助，各位大神。解决后，另有金币感谢！