calibre extraction question

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egg

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Dear all,

I use calibre to extract a layout in rcc model, but I found the post netlist has a
node called "0", who can tell me what is it? Because there are another vdd and gnd node.
 

any one who can help me?

I want to know how did calibre xrc handle the ground in extraction? There are 2 gnds? one is the metal gnd which had gnd text on it and the other is the sub? I don't know what i think is right or not...
 
updated!
 

pit1000, thanks so much!
 

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