<div class="gmail_quote"><br>Hello PETSC developers and users,<br>
<br>
In fortran the general PETSC_NULL is not valid. How can I<br>
pass a null argument iy in function<br>
<br>
VecScatterCreate(Vec xin,IS ix,Vec yin,IS iy,VecScatter *newctx)<br>
<br>
?<br>
<br>
Thanks and regards,<br>
<br>
Panruo Wu<br>
</div><br>