What errors do you get? The primary code change was to use real_t instead of PetscReal in calls to parmetis. The change was done to make parmetis built by petsc be same as default parmetis that others/distros might build. And this enables consistent usage from quad build of petsc. I can add –download-metis-double or similar option to configure – if useful. Satish From: Eric Chamberland<mailto:[email protected]> Sent: Wednesday, September 13, 2017 8:41 AM To: petsc-dev<mailto:[email protected]> Subject: [petsc-dev] ParMETIS change Hi, having trouble to compile our code with PETSc-master new defaults options for PARMEtis. Parmetis was using double precision before... By curiosity, is there a big performance gain to use float? Thanks, Eric