After the stop of the build, I tried to do the same compilation on command line, and I saw that it crashes. Then I did with under gdb to have the bt full log. VBR, Vincent. In GNU Emacs 24.4.50.1 (i686-pc-mingw32) of 2014-09-23 on CHOUNEK Repository revision: 117919 monnier@iro.umontreal.ca-20140922182202-1xk0sig32d1av0lw Windowing system distributor `Microsoft Corp.', version 5.1.2600 Configured using: `configure --prefix=c:/Programme/GNU/Emacs --without-jpeg --without-tiff --without-gif --without-png 'CPPFLAGS= -DFOR_MSW=1 -I C:/Programme/GNU/installation/emacs-install/libXpm-3.5.8/include -I C:/Programme/GNU/installation/emacs-install/libXpm-3.5.8/src -L c:/Programme/GNU/installation/emacs-install/libXpm-3.5.8/src' CPP=/mingw/bin/cpp.exe PKG_CONFIG_PATH=/mingw/lib/pkgconfig:/usr/local/lib/pkgconfig' Configured features: XPM SOUND NOTIFY ACL ZLIB Important settings: value of $EMACSPATH: c:\Programme\NGNU\CVS;C:\Programme\GNU\GnuPG;c:\Programme\apache-ant-1.8.0\bin;c:\msys\1.0\bin;c:\msys\1.0\mingw\bin; value of $LANG: FRA locale-coding-system: cp1252 Major mode: Shell Minor modes in effect: shell-dirtrack-mode: t recentf-mode: t mail-abbrevs-mode: t iswitchb-mode: t tooltip-mode: t electric-indent-mode: t mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t Recent input: r e SPC s e c j ' a i SPC r é u s s i SPC à SPC m e SPC l i b r é r é e e r , SPC e t SPC c ' e s t SPC k o k SPC p p i u r o u r SPC j e d u u d i SPC 1 3 : 3 0 SPC c o m m e SPC i n i t i a l e m e n t SPC p r é v u . SPC SPC N t a l a t a s h a . C-a C-M-% C-q C-j ² ( [ ^ C-q C-j ] ² ) ² SPC ² 1 n y n y n C-a C-k C-k C-k C-SPC M-w M-x r c e e c e t n f n t f - f C-s m a k e f C-w - t C-x d i n s C-x 1 i C-s b y t C-SPC M-w C-x b C-s C-s C-s f SPC C-y SPC t i a M-x r e p o r t e Recent messages: Replaced 2 occurrences Mark activated Open c:/msys/1.0/local/projects/lettre_observatoire/lettre_observatoire/dist_forge/lettre.dtx Mark saved where search started Mark set Mark saved where search started Mark set Auto-saving...done Mark set Making completion list... 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