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Deleting diff pairs in constraint manager

I have a pcb design where the pins in the previous version of this design were actually diff pairs. In the latest revision of this design, these pins have been changed to single type nets, not diff pairs anymore.

In the constraint manager I tried to delete the diff pair group but the delete button is greyed out. I tried unfixing the nets and symbols which are attached to these nets but still cannot delete them.

The nets are not considered diff pairs in the schematic.

I am using Allegro pcb editor 17.4

Thanks

0 HSID over 3 years ago in reply to HSID

In addition, the nets are not user defined, not sure what that means. That is why I cannot delete the diff pair name in layout by doing this command sequence. Select Logic from the top of the page, Select Assign Differential Pairs, scroll to the Diff pair name which has the nets I want to delete as a diff pair. I receive a message that on user defined diff pairs can be edited.
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0 jaredryan12 over 3 years ago

Allegro PCB Editor was where the diff pairs were first defined in their entirety.

quordle game
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0 Schulz Jordan over 3 years ago in reply to jaredryan12

Few cases if the design is assigned with IBIS models, the diff pairs cannot be deleted. Remove IBIS models & then delete the diff pairs. Sounds strange but it works
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0 Daniel over 3 years ago

if you want to delete all diff pairs quickly, you can use code below:

command: skill > axlDiffPair(axlDBGetDesign()->diffpair)
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