NAN or INF values of multi-step corrector 
[nuno-toshiba:10141] *** Process received signal ***
[nuno-toshiba:10141] Signal: Aborted (6)
[nuno-toshiba:10141] Signal code:  (-6)
[nuno-toshiba:10141] [ 0] [0xb7f4540c]
[nuno-toshiba:10141] [ 1] /lib/tls/i686/cmov/libc.so.6(abort+0x188) [0xb6129098]
[nuno-toshiba:10141] [ 2] /home/nuno/doutoram/Bouss/DOLFIN/DOLFWAVE/src/libdolfwave.so(_ZN6dolfin8dolfwave8PredCorr5solveERPNS_6VectorERPPNS_4FormERNS_6MatrixERPPNS_8FunctionESE_SE_dRNS_11DirichletBCERNS_8LUSolverESA_Rd+0x3df) [0xb66084af]
[nuno-toshiba:10141] [ 3] real_harbour(main+0x6fa) [0x8055c5a]
[nuno-toshiba:10141] [ 4] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb6112775]
[nuno-toshiba:10141] [ 5] real_harbour [0x80553d1]
[nuno-toshiba:10141] *** End of error message ***
