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Netlist import removes placed components

TH Designs

I have a schematic that has had several parts changed on it. The footprints remain the same, but either the symbol has changed or a part value has changed. Whenever I import the new "logic" the many of the components are "un-placed". There is no reason for them to be removed as the ref des has not changed nor has the footprint.

I just imported a new logic file and 95 parts were removed.

How do I prevent this from happening?

Frustrated..........

 Tom

  • oldmouldy
    From what you describe, the "device type" will have changed, PCB Editor usually has "Place Changed Component" set to "always" and should survive changes like this Check the log file after import to see if that has anything of interest in it. IF the parts really do have the same Refdes and Footprint values, you can use a placement list, before importing the logic, File>Export>Placement to generate the placement file, File>Import>Logic to update the netlist, File>Import>Placement to get the placement back BUT, I suspect that there is "something else" about the Logic Import that is causing the parts to be unplaced from the board.
  • TH Designs
    Thanks, I'll try exporting the placement first. I'll also review the schematic properties to look for anything that may have changed to prompt this. These were customer generated changes, I did not make them so something could easily have gotten missed.
  • TH Designs

    OM,

    Did what you said, worked perfectly. Thank you for the tip.

    Tom

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