About compare netlist

Hi all,

Let me tell the detail about my questions:

1. Fab house need our IPC netlist of PADS, first I link cam from PADS, but when the .cam file generated, the warning message show the copper

cann't translate for cam. Since it's a warning , I ignore it.

2. And then I open the CAM350, and open the cam file, then export netlist and select the IPC-D-356 netlist, the netlist come out.

3. Import the gerber files generating from PADS, and define the layer for top and bottom, then extract netlist.

4. Then select Analysis---Nets----Import IPC netlist.

5. Implement Analysis----Nets-----Compare External nets

It report as" .....No copper exists 11 missing external net for cam net. I can make sure it's something about the copper, but how can i

make sure the pcb netlist is good for fab? Dose anyone know that what's the right IPC netlist of PADS? Or I can follow the above programs to generate IPC netlist for Fab house and compare the netlist like that?

Thanks

Alex

Anyone who know the method for compare netlist in CAM 350 pls tell me , thanks .