Abdel, can you please have a look? lyx -e latex text Userguide.lyx
does enter an enless loop and can't even be killed with Ctrl-C. This happens both with qt3 and qt4. I believe that it is caused by your recent application reorganization. Exporting from the GUI works (well, for some definition of "works", the .tex file is unusable but at least created). lyx Userguide.lyx works too, so I suspect that it has something to do with batch command handling. Georg