Look at the source file first, its very short. $ g++ -c -save-temps main.cpp main.cpp:4: error: expected unqualified-id before ! token
$ g++ --version g++ (GCC) 4.0.2 20051125 (Red Hat 4.0.2-8) Copyright (C) 2005 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ cat /proc/version Linux version 2.6.17-1.2142_FC4smp ([EMAIL PROTECTED]) (gcc version 4.0.2 20051125 (Red Hat 4.0.2-8)) #1 SMP Tue Jul 11 22:57:02 EDT 2006 -- Summary: A member variable named 'not' is intrepreted by the compiler as the '!' sign. Product: gcc Version: 4.0.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: selalerer at nana dot co dot il http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29514