热流为什么施加不上

本人做激光打孔仿真的时候，结果在节点上施加热流时显示：Some of the defined and selected elements did not requireHFLU. Use the SFELIST,ALL,heat fluxes command to view alist of elements that did have the heat fluxes surface loadstored.

各位大佬这个怎么解决。