Partition File

From the manual, in section 4.6.1 "Partition File", it states:
"Partition numbers start from 0 up to the number of partitions minus one".
If I take the exact Mesh File that is illustrated on the same page, that is in
Figure 9 (a):
--------------
5 1
1 2 3
2 4 6
2 6 3
4 5 6
5 6 3
--------------
and then run:
partdmesh MeshFile1 3
the output of MeshFile1.npart.3 is
-----------------------------------
1
2
1
2
2
2
-----------------------------------
and the output of MeshFile1.epart.3 is
-----------------------------------
1
2
1
2
1
-----------------------------------
Why don't these start from zero as stated in the text?

RE: The partition files are

The partition files are correct. What you see here is the fact that Metis failed to compute a 3-way partition of this mesh and just computed a 2-way partition. This is a known problem for very small graphs/meshes in which Metis fails to produced a balanced partition.

A fix is on the works for the final release of Metis 5.0.