[petsc-users] Creating a Vec with DMCreateGlobalVector from a dmplex?

[aymeric aymeric]

- I create a dmplex with DMPlexCreateHexBoxMesh- Distribute it with 
DMPlexDistribute- Create a Vec based on the distributed dmplex with 
DMCreateGlobalVector- But when I check the size of this Vec with 
VecGetOwnershipRange or VecGetSize, it is empty.
What am I missing? 
I know this is possible, because in SNES ex12.c a vector is created using this 
sequence of commands. Unfortunately, it some other commands are also used, but 
they are not all documented.
Thanks.