I already did it by changing level of fill of PC of KSP, but I received the following error:
[0]PETSC ERROR: --------------------- Error Message ------------------------------------ [0]PETSC ERROR: Object is in wrong state! [0]PETSC ERROR: Cannot change levels after use! [0]PETSC ERROR: ------------------------------------------------------------------------ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120426/5ed2a528/attachment.htm>
