大佬们，请问这些报错怎么解决？
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The reference node 579 instance plan-1 on the *coupling option is not defined.
The reference node 579 instance plan-1 on the *coupling option is not defined.
The reference node 579 instance plan-1 on the *coupling option is not defined.
The reference node 579 instance plan-1 on the *coupling option is not defined.
The reference node 579 instance plan-1 on the *coupling option is not defined.
The reference node 579 instance plan-1 on the *coupling option is not defined.
A boundary condition has been specified on node set assembly__pickedset506 but this node set is not active in the model
Node set assembly__pickedset505 has not been defined
A concentrated load has been specified on node set assembly__pickedset505. This node set is not active in the model
Node set assembly__pickedset506 has not been defined
Analysis Input File Processor exited with an error - Please see the Job-2.dat file for possible error messages if the file exists.
