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Traces constantly becoming disconnected from pads for unknown reason.

wdecook

Using Orcad PCB Designer 16.6

When routing a board, I keep finding that several traces become disconnected from the pins they are routed to. It looks like the trace connects to each pin, the trace and pins both have the same net and are on the same layer, but a ratsnest is shown and the trace does not move if the symbol is moved.

This is an ongoing thing. Just when I think I'm done routing, I check the design status and there are hundreds more disconnected nets. Sure enough, traces that have already been routed have become disconnected. 

I had a theory that this may be related to using place replicate, but it now seems to be happening to traces that are not associated with a place replicate group. 

Does anybody know why this is happening and how to stop it?

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