having trouble with netlists and nets....I open the netlist window, right click the netlist name to create one with the cell name (top level cell), then I use "tool netlist" to open the tool. I click a label in a subcell then middle click labels in other subcells which are in the same net....repeat for other nets. I know something happened because exiting magic informs me a have a netlist with unsaved changes. Instead of prompting me to save it just gives me the option to not exit. Typing "writeall" or "savenetlist foo.net" doesn't give an error but doesn't write anything to disk...not sure what I'm doing wong