I followed your recommendation installing using LyXWin installer without uninstalling former versions. During installation, check for Miktex update (no one availabe Miktex version 2.4.1667)[ I do not update to 2.5], completing the installation process, LyX 1.5.1 crashed when starting. - My former version LyX 1.4.3 svn is still working properly and I still have former version 1.4 1) May I uninstall 1.5.1 version without disturbing 1.4.3 and try to reinstall it 2) I was looking to install JabRef but after installation the LyXWin installer advise me that it was not properly installed even it started . Might it be any relation regarding further crash of 1.5.1 ? ..anyway, I uninstall it. 3) for information LyX1.5.1 like others LyX versions is installed in program files when MikTeX is directly under C 4) I had a look inside the program files and I found a tmp in Resources directory named tmpdpmjmf.log. I do not know if it might be useful but here is the text: QUOTE This is e-TeX, Version 3.141592-2.2 (MiKTeX 2.4) (preloaded format=latex 2006.10.10) 27 AUG 2007 01:37 entering extended mode **\nonstopmode\input{c:/docume\string~1/admini\string~1/locals\string~1/temp/tm pdpmjmf.ltx} (c:/docume~1/admini~1/locals~1/temp/tmpdpmjmf.ltx) ! Emergency stop. <*> ...tring~1/locals\string~1/temp/tmpdpmjmf.ltx}
*** (job aborted, no legal \end found) Here is how much of TeX's memory you used: 10 strings out of 95890 214 string characters out of 1195173 44793 words of memory out of 1048577 3150 multiletter control sequences out of 60000 3640 words of font info for 14 fonts, out of 1000000 for 2000 14 hyphenation exceptions out of 4999 4i,0n,3p,99b,8s stack positions out of 5000i,500n,10000p,200000b,32768s No pages of output. UNQUOTE 5) I have been surprised because the configuration at the end of installation has been done very quickly when generally it last a very long time any clue Thanks Paul Schwartz "Uwe Stöhr" a écrit > Paul Schwartz schrieb: > >> Is it strictly necessary to uninstall former LyX versions ahead of >> installing 1.5.1 using the hereabove installer or official one's or can >> it be executed directly ? > > You can execute it directly. > > regards Uwe >