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It seems you are trying to load a cell with the exact same name as a previously loaded cell (see the third line above your command, next to the last name in that line)

the issue seems to be to do with the fact that if the cell isn't in the same folder then magic generates a full path for it, then when you try and get the cell again (same cell but using the relative path again) magic seems to think it's a different cell with the same name because one has the absolute path and the other has a relative path

@Tom: There may be several issues/misconceptions going on here. Magic assumes that your own design and design files are in your current working directory and descendants thereof; files from PDK libraries are assumed to be in an absolute path, although they can be made portable by setting the Tcl variable PDKPATH (if you run magic with the -magicrc argument, this is done automatically). Generally, when creating a design, you want to use "addpath" to create the search path for cells in the right order (again, with -magicrc this is done automatically). After that, adding a cell is just a matter of doing "getcell <name>" with the name of the cell, not the name of the file. If you want to get a cell from a place that has not been added to the set of search paths, then you can use "getcell" with the full path for the file; then the cell is associated with that path. Once the cell is associated with the path, you should not do "getcell" with another path name for the same cell---that's an error, since the same cell cannot exist in two places at the same time.