I would like to estimate a DC drop on a signal line, actually a feedback sense line back to the DC/DC regulator. First I have exported the line into the LineSim schematic. The problem is that the DC Drop tool does not recognize that signal as power plane.
I think we need some more information about the particular issue. Did the net of interest export into the schematic? Is the net of interest defined as a power supply net in BoardSim? Is the net routed with all area fills, or does it also include traces? Maybe a few pictures of the net in BoardSim and then how it appears in LineSim would help describe the issue.