[petsc-users] Error while calling a fieldsplit preconditioner containing a mg/gamg preconditioner

Luc Berger-Vergiat lb2653 at columbia.edu
Fri Nov 21 15:12:52 CST 2014

Yes good call, I pulled master and got the patch.
I don't have errors anymore.

Do this mean that when a dm is active, the dm is assumed to create hold 
the information about the vectors (residual, solution and internal work 
vectors) for the problem, whereas when the dm is not active or is not 
used, the ksp is assumed to hold the information about vectors format?


On 11/21/2014 12:08 PM, Lawrence Mitchell wrote:
> On 21 Nov 2014, at 16:55, Luc Berger-Vergiat <lb2653 at columbia.edu 
> <mailto:lb2653 at columbia.edu>> wrote:
>> Sure, so with gamg (which was my first choice too), I get the following:
>> [0]PETSC ERROR: --------------------- Error Message 
>> --------------------------------------------------------------
>> [0]PETSC ERROR: Must call DMShellSetGlobalVector() or 
>> DMShellSetCreateGlobalVector()
>> [0]PETSC ERROR: See 
>> http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting.
>> [0]PETSC ERROR: Petsc Release Version 3.5.2, Sep, 08, 2014
>> [0]PETSC ERROR: /home/luc/research/feap_repo/ShearBands/parfeap/feap 
>> on a arch-opt named euler by
> I wonder if this is the same problem described here 
> https://bitbucket.org/petsc/petsc/pull-request/221
> Where the ksp contains an inactive dmshell that doesn't know how to 
> create vectors
> Lawrence

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