after successfull netlisting and placement ,routing the
board: there is some changes req. in schem so i added some components
and annotated the sch.After netlisting the design by choosing input
board file as previous and output board file as new1.brd(uncheck the
allow etch removal),
few nets on the PCB are getting ripped up and some components are swapped.
is this because of logic change happened in schem since i did annotation or im missing out something.