Check this out: $ lex lexer_l.l "lexer_l.l":line 96: Error: missing translation value Does anyone know why this happens? If we can't figure this out, then everyone that compiles bogofilter on Solaris must have flex installed so it can be generated. One workaround is to distribute the lexer_l.c file in the released source like version 0.7.3 did. Adrian