communicator 958 ompi/attribute/attribute.c COPY_ATTR_CALLBACKS(communicator, old_object, hash_value, communicator 1062 ompi/attribute/attribute.c DELETE_ATTR_CALLBACKS(communicator, attr, keyval, object, ret); communicator 1221 ompi/attribute/attribute.c DELETE_ATTR_CALLBACKS(communicator, old_attr, keyval, object, ret); communicator 56 ompi/debuggers/predefined_pad_test.c PAD_CHECK(communicator); communicator 67 ompi/mca/io/romio321/romio/adio/include/adioi_errmsg.h MPIR_ERR_COMM_NULL (null communicator. from MPICH)