virtuoso中用NC-verilog提取netlist，出现Instanc的functional 绑定到另一个库里

bhd740

virtuoso中用NC-verilog提取netlist，出现：
ERROR (OSSHNL-366): Instance 'u0' in cellview 'FPX10P30S_PAD_ww/PAD_SCL/functional' is bound to placed master 'ovtlib/bufif0/symbol'.
However, OSS has determined that it is not a valid placed master. Ensure that
cds.lib has entries for all the reference libraries and netlist again. Correct
this error and netlist again.