NinaNutz <lamari...@...> writes: I have solved partially the problem. I have uninstalled the old programs of miktex (2.5) and lyx (1.44 and 1.5) and now I can see the mistakes.
I have installed what the program was asking for and now I am stopped again... Package inputenc Error: Keyboard character used is undefined ---------------------- ...ock {\em Fuzzy Sets and Systems}, 40:473– 489, 1991. You need to provide a definition with \DeclareInputText or \DeclareInputMath before using this key. --------------- ...ck {\em Proceedings of the IEE}, 12:1585– 1588, 1974. You need to provide a definition with \DeclareInputText or \DeclareInputMath before using this key. I think this correspond to the bibliography of JabRef... Which are the mistakes? What can I do to solve that?