When I was trying to edit an older design which my senior had done. When I right click on any Netname, Aliases or Offpage connectors and selecting ' signals ' to see where it is routed it was throwing a dialogue box trowing "No Signal Present" . But in the older design file signal tracing is working properly. the older design had different values in instances and occurrences of almost all the components, so i manually copied all the occurrences to instances (This is the only difference from old board and new board). What can be the problem and how can i resolve it?
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