The problem is caused by the presence of nested derived types in a component which appears in a namelist.
-- Summary: Namelist error Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: blocker Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: fmuldoo at me dot lsu dot edu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36582