PETSC_NULL_OBJECT On Aug 18, 2012, at 11:57 PM, Panruo Wu <armiuswu at gmail.com> wrote: > Hi PETSC developers and users, > > In fortran the general PETSC_NULL is not valid. How can I > pass a null argument iy in function > > VecScatterCreate(Vec xin,IS ix,Vec yin,IS iy,VecScatter *newctx) > > ? > > Thanks and regards, > > Panruo Wu