Optisruct773报错，想问一下怎么处理呀？
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*** ERROR # 773 ***
When a grid has no rotational stiffness, then this rotational d.o.f.
cannot be an independent d.o.f in an RBE3.
RBE3 id = 2164178
grid id = 1413426
weighted components = 123456
You should remove the rotational d.o.f. in the RBE3 for this
independent GRID.
************************************************************************
There were 368 error messages during input processing.
The first message is repeated below:
*** ERROR # 773 ***
When a grid has no rotational stiffness, then this rotational d.o.f.
cannot be an independent d.o.f in an RBE3.
RBE3 id = 2164178
grid id = 1413426
weighted components = 123456
You should remove the rotational d.o.f. in the RBE3 for this
independent GRID.
*** Run terminated because of error(s) in the input data.
请问这个怎么处理？
Wonderful仿真 
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