I use pdflatex to create PDF files from lyx. In the preamble I have \pdfinfo { /Author (Tuukka Toivonen and Markus Mattila ) /Title (Accurate Positioning Unit) /Subject (Sulautettujen järjestelmien työ) } However, it doesn't accept ä and ö characters. I also tried \"a and \"o without success. I don't have anything in TeX encoding field. Should I? Error message: ! Undefined control sequence. \add@accent ...l \mathchardef \accent@spacefactor \spacefactor }\accent #1 #... l.32 ...bject (Sulautettujen jarjestelmien tyo^^f6 )