workbench网格不保存

各位大神，小白画网格时出现如下情况 The selective body meshing is not being recorded, so the meshing may not be persistent on an update. If you want to record the order of the body meshing, please use the Mesh Worksheet to track the meshing steps. Please see Selective Meshing documentation for more details.
划网格不能保存，求大神指点