HI Folks, I've done a fresh update of mpich2 trunk on my sles 11 machine, done a new autogen.sh and config of mpich. But when I compile, I get this error in this fairly recently introduced file: src/mpi/datatype/status_set_elements_x.c: In function 'MPIR_Status_set_elements_x_impl': src/mpi/datatype/status_set_elements_x.c:41: error: 'LLONG_MAX' undeclared (first use in this function) src/mpi/datatype/status_set_elements_x.c:41: error: (Each undeclared identifier is reported only once src/mpi/datatype/status_set_elements_x.c:41: error: for each function it appears in.) make[2]: *** [src/mpi/datatype/status_set_elements_x.lo] Error 1 It looks like mpiimpl.h isn't pulling in limits.h. Howard -- Howard Pritchard Software Engineering Cray, Inc.