PETSC debug

[billy at dem.uminho.pt]

Hi,

I was running my code and I got FPE error on alpha machines.

Using gdb the output is the following. I am using 4 processors.

Program received signal SIGFPE, Arithmetic exception.
0x1202c4e1c in MatMult_SeqBAIJ_1 (A=0x120bbc7c0, xx=0x120be0770,
    zz=0x120bc9fb0) at baij2.c:260
260         while (n--) sum += *v++ * x[*idx++];
(gdb) print n
$1 = 0
(gdb) print idx
$2 = (PetscInt *) 0x120c7aab8
(gdb) print *idx
$3 = 1710
(gdb) print v
$4 = (MatScalar *) 0x120c99190
(gdb) print *v
$5 = 4.0109832449655266e-12
(gdb) print x
$6 = (PetscScalar *) 0x120be1690
(gdb) print x[*idx]
$7 = 1.2349520920477556e-308
(gdb) print sum
$8 = 0


Billy
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