On Wed, Feb 8, 2012 at 23:39, Alexander Grayver <[email protected]>wrote:

It happens within the CG solver with the system matrix which is created like this: call MatCreateShell(MPI_COMM_WORLD,mlocal,nlocal,N,N,PETSC_NULL_INTEGER,H,ierr);CHKERRQ(ierr)

This should be fixed in petsc-dev now, can you pull and try again?