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Capture vs PCB Editor: Pin number mismatch Error message

Ulf K

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(Capture CIS / OrCAD Layout Prof.)  v. 23.1)

I have a design where the (Capture) Schematic contains two SOT-89 symbols.

Their pins are designated "1", "2", "3"; and "TAB". The corresponding footprint has pads named exactly the same: "1", "2", "3", and "TAB".

Creating the layout, editing it, adding or changing components in the schematic is successfully synchronized every time.

The layout editor opens, it "Pulls" the schematic and the changes are applied.

But: I constantly have two warnings in Capture that the number of pins does not match:

Warning Physical (WARNING OrCAP-2435) Number of pins in footprint "SOT-89" and instance "U3" does not match (Same message for the other, U4...) 

Did some programmer never thought of the possibility that pins could be numbered with other characters than numbers?

Or does Capture and PCB-Editor have different opinions about "numbers" ?

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  • 0

    WARNING ORCAP-2435 is a physical DRC and it comes when the number of pins in the schematic symbol does not match with the number of pins in the footprint and  alphanumeric pin numbers are case sensitive, so it must be ensured that the pin number's casing should be same in the schematic symbol and the footprint.

    To resolve this physical DRC warning, perform the following steps:

    1. Double-click on the DRC warning in the Online DRC window in OrCAD Capture. This will take you to the part on the schematic and highlight it.
    2. Right-click and choose Edit Part. This will open Capture Symbol Editor (Part Editor).
    3. Right-click and choose Edit Pins or press Shift+H. This will open the Edit Pins dialog box.
    4. Now, compare this with the footprint by opening the footprint file in Allegro PCB Editor.
    5. Choose Display > Status to see the count of Connect pins and Mechanical pins in Allegro PCB Editor.
    6. Compare, the number of pins footprint and in the schematic symbol. 

    Let me know how it goes for you after performing the steps.

  • 0 in reply to Jeet

    Hi Vishwajeet.

    Thanks for responding to my question.

    (23.1 HotFix 007 by the way)

    I followed your instructions to the letter but found no discrepancies in either the schematic symbol nor the footprint.

    No hidden pins or pins set as "Power". All = Passive.

    No mechanical pins in the footprint.

    All pin "numbers" are either numbers or capital letters.

    No leading or trailing whitespaces.

    No DRC's in the Status-canvas in the PCB Editor. DRC's are "Green". Back drills grayed out (no drill holes)

    I am on active support with cadence. I can submit a trouble report but I thought that the forum was the best way to start.

Reply
  • 0 in reply to Jeet

    Hi Vishwajeet.

    Thanks for responding to my question.

    (23.1 HotFix 007 by the way)

    I followed your instructions to the letter but found no discrepancies in either the schematic symbol nor the footprint.

    No hidden pins or pins set as "Power". All = Passive.

    No mechanical pins in the footprint.

    All pin "numbers" are either numbers or capital letters.

    No leading or trailing whitespaces.

    No DRC's in the Status-canvas in the PCB Editor. DRC's are "Green". Back drills grayed out (no drill holes)

    I am on active support with cadence. I can submit a trouble report but I thought that the forum was the best way to start.

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