Also sprach Kenward Vaughan: > The space worked fine. Should that always be done with ERT?
To terminate a command, if no other termination is done. In your case, LaTeX thought you meant the command \onsted (which could very well be meant), and failed, because no such command existed. If another command follows (Br\o\ss), not termination is needed. You can also terminate by braces (Br{\o}nsted or Br\o{}nsted), but this affects the kerning, so the space is suggested. Jürgen