Solve a system with two processors

Hello PETSc's users! I have a problem with my parallel program. If I run it with only one processor (mpirun -np 1...), everything is all right but if I use 2 processors (mpi -np 2...), the problem appears. When I want to solve my matricial system through a solver, after having created my matric

Some error when I try to solve a matricial system

Hello PETSc's users, I have just started to use PETSc and when I try to solve the matricial system I obtain the following error sentences: [0]PETSC ERROR: MatLUFactorNumeric_SeqAIJ() line 538 in src/mat/impls/aij/seq/aijfact.c [0]PETSC ERROR: Detected zero pivot in LU factorization see http://

Undefined symbol in executing time

Hello PETSc's users! I am trying to use PETSc for the first time along with another library. I compile my program without any problem but when I try to execute it, in a parallel way, I obtain the following error: "symbol lookup error: /path_where_PETSc_is_installed/petsc-2.2.1/lib/libg_c++/linu