Thanks to Tommy Hassinen and Michael Banck for their advices ! I solve the gtk problem, get the cvs version of ghemical (1.5) with : cvs -d:pserver:anonymous@bioinformatics.org:/cvsroot checkout ghemical (and idem with libghemical). I try to compile it with gcc > 3.2 ! It seems not to work :-( ! The configure step complete without error, but when I use make it stops due to an error at geomopt-dialog.cpp once at approx line 20 and approx after at 80. Has is something to do with a glut_init not found ("Checking for glutInit in -lglut : no") in the ./configure step [but Gl/glut.h is present !!!!)? For libghemical, ./configure works fine (with the same preceeding remark) but here there are syntax errors : in cdiag.c in function 'cdiag_' c:33 syntax error before "fm06as..." At top level same kind of error line 558 and line 724 in fonction 'me08a_' c:628 syntax error before "fm06bs..." What should I do Thanks for your answer ___________________________________________________________ Do You Yahoo!? -- Une adresse @yahoo.fr gratuite et en français ! Yahoo! Mail : http://fr.mail.yahoo.com