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Need help deleting a differential pair

wdecook

Using OrCAD PCB Editor 16.6-2015

I'm trying to delete a differential pair, but getting very odd behavior. In Constraint Manager, I find the pair in Net->Routing->Differential Pair. I right-click on the pair name and choose Delete. The pair is then deleted, but also the tool decides to auto-generate edge-to-edge etch shapes on every layer of my board!. My board outline also disappears at this time.

What is going on here?

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  • redwire
    Hmmm....I've only been on Allegro since '94 and have never seen this behavior. The fact that you had to "derive connectivity" hints at a setup problem on the board. If you are willing to zip it up and post it here or email it I'm sure one of the users would be able to solve it. Normally these issues should be sent to the Cadence help line -- this is the user's forum and is not supported by Cadence for problems.
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  • redwire
    Hmmm....I've only been on Allegro since '94 and have never seen this behavior. The fact that you had to "derive connectivity" hints at a setup problem on the board. If you are willing to zip it up and post it here or email it I'm sure one of the users would be able to solve it. Normally these issues should be sent to the Cadence help line -- this is the user's forum and is not supported by Cadence for problems.
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