CoryThe root of the problem is this:On Thu, Dec 22, 2016 at 3:50 PM, Cory Chu <cory.yk.chu@gmail.com> wrote:TAT/Slab can only be used if there is a single local component per MPI process
The thorn TAT/Slab has certain limitations, and these require that a certain minimum number of MPI processes is used, so that certain operations can occur simultaneously. If you increase the number of MPI processes the error should go away.