Not sure if this is known or not, I couldn't find any reference to it. If you have a Maplet that you serve over the Internet using MapleNet, if the Maplet code has a trailing comment character - # -, then the Maplet won't display. You get the unhelp error message: "Exception is server did not return a correct Maplet Definition. Results were" It's a trivial problem once you find it, but finding it was not trivial. For the MapleNet developers. Take any Maplet, add a new line at the end of the file, put a comment character at the start of the line. The Maplet will not work. You can add the comment char to the .maplet file or to a .mw that is then exported. Happens in MapleNet 10.5 and MapleNet 11.