To trace this error took me a while; so I thought, its worthwhile to report on it.
I am Using Lyx1.6.7 Debian and koma book. I have inserted a nomenclature item which I coppied and pasted from the internet. It contains the apostrophs „innere Uhr“ Running view pdf (pdflatex) gave This Error 84 returned from iconv when converting from UCS-4LE to ISO-8859-15: Invalid or incomplete multibyte or wide character Converted output: 0x5c 0x6e 0x6f 0x6d 0x65 0x6e 0x63 0x6c 0x61 0x74 0x75 0x72 0x65 0x7b 0x5a 0x65 0x69 0x74 0x67 0x65 0x62 0x65 0x72 0x7d 0x7b 0x73 0x69 0x6e 0x64 0x20 0xe4 0x75 0xdf 0x65 0x72 0x65 0x20 0x45 0x69 0x6e 0x66 0x6c 0x75 0x73 0x73 0x67 0x72 0xf6 0xdf 0x65 0x6e 0x2c 0x20 0x64 0x69 0x65 0x20 0x64 0x69 0x65 0x20 File '/tmp/lyx_tmpdir.TJ3769/lyx_tmpbuf0/EG-T16a.tex' was not closed properly. I could not export the .tex file. By taking stepwise parts of the book away I could trace the error to the nomenclature item mentioned above. Taking away the apostrophes cured the problem. What is strange, however: If I put the same „innere Uhr“ in the normal text there is no error after a pdflatex run. So apparently the nomenclature has difficulties to convert from UCS-4LE to ISO-8859-15. By the way, it would be nice to have a list of enumerated items similar to the list of figures, list of citations etc. Not sure, whether this is planned. Its kind of unfair to ask for it, but since I can't program, what I can offer is to help translating (English to German) or to spend money. And thanks to all those of you who have made and are still making LyX to such a helpful device. Wolfgang
