Hello, While compiling one of my code with ifort , I have the following error pointing towards petscvec.h . Any idea about this posssible kind of error please ? Any option of ifort to use ? Many thanks Tahar ifort -assume byterecl -I/usr/local/petsc/ -I/usr/local/petsc//include -I/usr/local/petsc//include/finclude -I/usr/local/petsc//macx/include -I/usr/X11R6/include/X11 -DPETSC_HAVE_PARMETIS -DPETSC_USE_DEBUG -DPETSC_USE_LOG -DPETSC_USE_BOPT_g -DPETSC_USE_STACK -DPETSC_AVOID_MPIF_H -c petsc.fpp /usr/local/petsc//include/finclude/petscvec.h(10): error #6418: This name has already been assigned a data type. [NORM_1] integer(kind=selected_int_kind(5)) NORM_1 -------------------------------------------- T. Amari Centre de Physique Theorique Ecole Polytechnique 91128 Palaiseau Cedex France tel : 33 1 69 33 42 52 fax: 33 1 69 33 49 49 email: <mailto:[email protected]> URL : http://www.cpht.polytechnique.fr/cpht/amari