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Update PCB from schematic

Brian Rocks

Inevitably in the course of working on the PCB layout I needed to make a change to the schematic. This is the first design that I've done with Orcad.

I got an error when placing a part and needed to update the schematic side - I needed to update a component.  Now I am unsure how to push this change to the PCB side.  I didn't really see this covered in the tutorial and I am afraid of screwing up the work I've already done.  So how does one push a change from the schematic capture to an in-progress PCB layout?

  • steve
    Simply import the new netlist into the existing board. If you do this from the schematic (Tools - Create Netlist) make sure that the Input Board is the board you want to make the changes to. Output Board can be another name (if you want to keep a history / backup. When you import the netlist this is like completing an ECO so will only change items that have been effected. Just to be on the safe side you can always make a backup copy of the board before you start just in case you don't like what you see.....
  • Brian Rocks

    Forgive me for being a newb, but I don't think I'm doing this right.


    I regenerated my netlist files in ORCAD by going to Tools>Create Netlist and unselecting the "Create or update PCB editor board" box

    I went back into Allegro and tried to import the changes by going to File>Import Logic>Import Cadence

    I got the following:

    CmdLine: netrev -$ -i CLOCK_INTERFACE_BOARD -y 1 C:/Orcad_Projects/Clock_Interface/allegro/#Taaaaah05836.tmp

    ------ Preparing to read pst files ------

    #1 ERROR(24) File not found

    Packager files not found

    #2 ERROR(102) Run stopped because errors were detected

    Can you tell me what I'm doing wrong?

  • chads108

    Will start with the obvious.  Are you pointing to the correct folder when importing?  Should be several pst*.dat files in the folder you import is pointing to.

  • Brian Rocks

    I believe so.  Allego has the "import directory" as:  C:/Orcad_Projects/Clock_Interface/allegro

    The Netlist file directory is the same as well.  I checked the directory and it contains the pstchip, pstxnet, and pstxprt file.

    I do not see a #Taaaaaj05836.tmp file, however.

  • steve
    Nothing to do with the Temp file. Try again if that's your netlist files. The error "Packager files not found" mean exactly that, it can't find them. This error only happens if you don't browse to find the netlist files. (But you can do this from Capture as I mentioned earlier anyway. Don't uncheck the "Create or update PCB editor board" box just make sure that the input board is set as your board you want to change - that's the key here).
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