spectre simulation warning

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lhlbluesky

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when post-simulation, there are some warnings as follows:

No DC path from node 'I19._net0' to ground, Gmin installed to provide path.
No DC path from node 'I17._net0' to ground, Gmin installed to provide path.
No DC path from node 'I15._net0' to ground, Gmin installed to provide path.

and so on.

however, i can't find the node 'I19._net0', 'I17._net0', 'I15._net0' etc. why?
waht is the meaning? and how to find the nodes? and what is the reasons?
can anyone met the problem before? and can this affect the simualtion results?
pls help me. thanks all.
 

These may be "buried" nodes inside a subcircuit used as
an intermediate "layer" in the netlist. My CAD setup is this
way, the schematic netlisting points at subcircuits and not
straight models.

If you follow the chain, the subcircuit would have probably
a real FET and maybe some extrinsic capacitances that have
net0 inside the mesh. You could hack the model file and put
a crazy large resistor (like 1E15) to "0" node.
 

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