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.
Mike Reagan > Hello Mike, > I tried your fool proof method and everything works great. Thanks for > taking the time to help me out. Take care and have a nice night..... > > -----Original Message----- > From: Mike Reagan [mailto:[EMAIL PROTECTED]] > Sent: Thursday, February 13, 2003 2:26 PM > To: Protel EDA Forum > Subject: Re: [PEDA] A Question About Netlist Compare and Partially > Matched Nets. Protel 99SE SP6. > > > John, > You really don't have to do a netlist compare. I see designers doing this > all of the time. This may have developed because of a mistrust of other > programs they have used because DRCs couldn't be trusted. The bottom line > is the DRC netlist checking in versions 2.8 - 99SE SP 6 work and work > quite well. As far as I know the errors that the program will not check > for is : 1 if you deleted a component 2: duplicate pins., 3 it will > miss split plane problems once in while. > > To address your real question, the differences could be attributed to > several things, 1: the netlist generated from the board does not > accurately represent the board because of a Protel issue ( I don't call > this one a bug because the DRC wasn't designed to work this way) . 2 A > second netlist generated from the schematic may have different names for > nets which we not names. 3. Other parts, or pads on the netlist which you > have connected are now in the netlist, 4: Plane information is not > accurately generated. In any case this is not a good method of > verification > > A Fool Proof method for verification: > Clear all nets, > Load netlist again > Update free primitives from pad > Run your DRCs. > Review your DRCs , if you have everything set up right it should all read 0 > > I will guarantee this is 100 percent fool proof. > > > Good Luck > > Mike Reagan > EDSI > Frederick Md > > > > > > > > About Netlist Compare and Partially Matched Nets. Protel 99SE SP6. > > > > Hello All, > > Have a PCB design that is completely routed. The board information report > > and DRC report state that everything is 100% routed with no violations. > OK > > great. > > > > In the schematic side I generate a Netlist. Now I go to the PCB side and > > from Netlist Manager I export the Netlist from PCB. I then do a Netlist > > compare and everything is good. > > > > I then go to the schematic side again and do a Netlist compare with the > > same two files. The report states that I have 2 Partially Matched Nets. > > How can this be? > > > > What exactly is a Partially Matched Net? To me it sounds like parts of > the > > net in question are not completely routed. > > > > Has anyone out there had this experience? Do I have a problem with my > > design or is this a Protel bug - feature? > > > > Any information that you can give me will be greatly appreciated. Thank > > you for your time and have a nice day. > > > > > > > > John Branthoover : > > Electrical Design Engineer : > > Acutronic R & D :Phone (412) 968-1051 > > 640 Alpha Drive :Fax (412) 963-0816 > > Pittsburgh PA 15238 :Email [EMAIL PROTECTED] > > USA :WEB http://www.acutronic.com > > > > > > > > > > > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
