请帮看一下这个错误（用HW80做前处理提交计算时出现的）

beifeng

我用HW8.0做的前处理，提交计算时出现这个错误
in keyword *ELSET, file "Job-door.inp", line 60699: Period cannot be used within set, surface, orientation, instance, and assembly names in a model defined in terms of an assembly of parts

谢谢了