---- STOP ---- Maximum error level reached. The error was : Surface merged_domain.21.linear.2.0.0 (TOPOLOGY 1) touches different types of components ['Acoustic1', 'Solid2'], which is forbidden. Corresponding domains are ['FiniteDomain.17.linear.3.0.0', 'FiniteDomain.18.linear.3.0.0'] Some have unknown quantities ['DISPLACEMENT'], others have different unknown quantities ['VELOCITY_POTENTIAL'] Please check the trace file(s) for further information. Application is now exiting (return code: 254), please wait...我先计算了iCFD，再进行DFR的时候报错说field1在赋值前被引用，可是我已经有了freq文件，到底是怎么回事？