One of my programs works fine with GPC2.1/gcc2.95.3 it does not compile with 2003/03/23 I could isolate the problem (out of a 5000 lines source) to two small units (see below) The original unit declaz contains global variables and procedure common to almost all the rest of the program. Ttwo of its (public) variables are masked in the implementation part of another unit by a variable with the same name (not a bug). There is a warning for this situation: fine, but not so fine, all the variables declared after the warning are ignored, and trigger errors when they appear later. To see it happen, copy the two sources below as gdeclaz.pas and gimpragr.pas, and try gpc --automake -c gimpragr.pas I get jp@brea:~/agreg/src/pascal> gpc --automake -c gimpragr.pas gimpragr.pas:21: redeclaration of `l132' gdeclaz.pas:6: previous declaration gimpragr.pas: In procedure `presidence': gimpragr.pas:23: undeclared identifier `president' (first use in this routine) gimpragr.pas:23: (Each undeclared identifier is reported only once gimpragr.pas:23: for each routine it appears in.) gimpragr.pas:23: undeclared identifier `presidente' (first use in this routine) ***************************************************************************** unit gdeclaz; interface var l132 : boolean; implementation END. ********************************************************************************* Unit gimpragr; Interface Procedure impression; Implementation Uses gdeclaz; Var l132, president,presidente,chrono: Boolean; Procedure presidence; Begin If Not (president Or presidente) Then Begin write('La présidence est elle tenue par un homme ou une femme H/F ? '); End; End; { presidence } procedure impression; Begin writeln('impression'); end; END. ****************************************************************************************** -- Jean-Pierre Vial