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xnets

PhilR787

When I import a netlist for OrCad, xnets are generated.  They show up in the constraint manager and I can't remove members or delete the xnets.

How do I prevent xnets from being generated in the 1st place.

Thx,

Phil

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  • You can add a Comps level property (Edit - Object Properties then Comps in the Find pane) called NO_XNET_CONNECTION with a value of True which stops the xnet being created. This can also be added in the schematic.

  • in reply to steve

    Steve, you are correct.  I invoked the constraint manager in Capture (even tho I didn't use it) and then I started getting the xnets.  I add the property NO_XNET_CONNECTION and now the xnets are gone.  How did you find out about adding the property?  Sucks that Allegro forces me into a different flow without asking/warning that it's happening.

    Thanks for the help.

    Phil

  • in reply to PhilR787

    The property has been around fo a long time but was to restrict xnets being created in the old flow if you use Signal Analysis. You are warned when you first invoke CM in Capture. The flow is really helpful if you want to set constraints, you just need to ensure you always back annotate once you start that flow. 17.4 is better with Design Sync

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  • in reply to PhilR787

    The property has been around fo a long time but was to restrict xnets being created in the old flow if you use Signal Analysis. You are warned when you first invoke CM in Capture. The flow is really helpful if you want to set constraints, you just need to ensure you always back annotate once you start that flow. 17.4 is better with Design Sync

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