This look like there might be a memory leak in PETSc. Let me know if this is not obvious and get more detail. Mark [0]Total space allocated 16 bytes [ 0]16 bytes PCFieldSplitGetSubKSP_FieldSplit_Schur() line 1263 in /global/u2/m/madams/petsc/src/ksp/pc/impls/fieldsplit/fieldsplit.c [0] PCFieldSplitGetSubKSP_FieldSplit_Schur() line 1263 in /global/u2/m/madams/petsc/src/ksp/pc/impls/fieldsplit/fieldsplit.c [0] PCFieldSplitGetSubKSP() line 1665 in /global/u2/m/madams/petsc/src/ksp/pc/impls/fieldsplit/fieldsplit.c [0] KSPSetUp() line 247 in /global/u2/m/madams/petsc/src/ksp/ksp/interface/itfunc.c