That did do the trick with the examples, thank you. I am still struggling with my own simple example however. Is there any documentation available on how to use petscFE? I could not find anything besides the three examples. And I yet have to grasp the concept.

Thanks in advance,

M. Hartig

On 27 Jun 2016, at 15:49, Sander Arens <Sander.Arens@ugent.be> wrote:

I think you forgot to set the order of the finite element spaces, which default to 0. Does it work if you try for example ex77 with the following options found here?

Thanks,

Sander

On 27 June 2016 at 15:28, <rickcha@googlemail.com> wrote:

Dear Petsc developer team,

while learning the ways of the petscFE I came across a curiosity I’d like to point out to you. The Jacobians that are created from the petscFE object seem to have only 0-entries (apart from the obviously empty regions) in examples 12 and 77. That might be due to a limited understanding from my side on how exactly petscFE and the mentioned examples work, but it struck me as unusual.

Thanks in advance,

M. Hartig