On 07:38 PM 13/02/2003 -0500, Mike Reagan said:
John You are welcomed...but I should practice what I preach. I have been using this method with 99SE SP6 and have had flawless designs. Ok until last week , we got a board back with power and gnd were not connected to the input connector. The original ECO was a minor change, I imported a netlist, and since I knew what the ECO was, made the quick changes. Ran DRCs and sent gerbers. The problem was.....the footprint for the power connector had duplicate pin numbers. A second import of a netlist in Protel causes all of the pins to disconnect, at third import will cause only one of the pins to connect. Every subsequent import will cause differnet results . I already was aware of it but didnt see the connector. This will not show up as an error when you import the netlist either. Had I stuck with my fool proof method and not taken a shortcut ( because I made an assumption) I wouldnt have had mud in my face. Clear the netlist, import the netlist , connect copper, run drcs .....100 percent of the time and you will never have a problem. So said the fool of the week only because I made an assumption.
A solution to this issue, for some at least, is to use Update PCB (the synchronizer) rather than netlist load.
I know, Mike, that you get netlists often rather than P99SE sch so this is not always a solution, but the synch deals with the duplicate pins correctly, I think. I don't use duplicate pins (as it I don't like the risks), but I think others have stated that the sycnh is OK but netlist load has the oscillatory connect/disconnect behavior.
Ian
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