Dear Uwe Stohr - lyx Team i used lyx 2.2 from many months, but after i updated lyx 2.2 from Git (today), i got this msg : " /home/sea/Documents/my physics book/الإنعكاس والمرايا10/الانعكاس والمرايا.lyx is from an older version of LyX and the lyx2lyx script failed to convert it. "
?! best regards Hatim