Hi, I just noticed there are warnings at compile time for some mkl_cpardiso.c routines: /pmi/cmpbib/compilation_BIB_gcc_redhat_petsc-master_debug/COMPILE_AUTO/petsc-master-debug/src/mat/impls/aij/mpi/mkl_cpardiso/mkl_cpardiso.c: In function ‘MatDestroy_MKL_CPARDISO’: /pmi/cmpbib/compilation_BIB_gcc_redhat_petsc-master_debug/COMPILE_AUTO/petsc-master-debug/src/mat/impls/aij/mpi/mkl_cpardiso/mkl_cpardiso.c:236:7: warning: passing argument 16 of ‘cluster_sparse_solver’ from incompatible pointer type [enabled by default] (int*)&mat_mkl_cpardiso->err); and some more, full log here: http://www.giref.ulaval.ca/~cmpgiref/petsc-master-debug/2018.12.14.09h24m33s... and configure log: http://www.giref.ulaval.ca/~cmpgiref/petsc-master-debug/2018.12.14.09h24m33s... Thanks, Eric