Hi, I try to install MPICH 3.04 with logging enabled. So I configure with commands: ./configure --enable-timing=log --with-logging=rlog --enable-timer-type=gettimeofday When configuring rlog, it said "Makefile.in" could not be found in the following directory /mpich-3.0.4/src/util/logging/rlog/ So I copied the "Makefile.in" in mpich-3.0.4/doc/logging/ to that directory and it configured successfully. However, when I tried to make it, there is an error CC src/mpi_t/cat_changed.lo src/mpi_t/cat_changed.c: In function 'PMPI_T_category_changed': src/mpi_t/cat_changed.c:104:5: error: 'MPID_STATE_MPI_T_CATEGORY_CHANGED' undeclared (first use in this function) src/mpi_t/cat_changed.c:104:5: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [src/mpi_t/cat_changed.lo] Error 1 So how could I solve this problem? Thanks Yi