> On Jan 6, 2019, at 5:21 PM, Victor Eijkhout <[email protected]> wrote:
>
> Hey Barry,
>
> Chang is one of my users and I’m out of my depth here:
>
> > [0]PETSC ERROR: --------------------- Error Message
> > --------------------------------------------------------------
> > [0]PETSC ERROR: Corrupt argument:
>
> > [0]PETSC ERROR: Invalid Pointer to Object: Parameter # 1
>
> > [0]PETSC ERROR: #1 VecGetArray() line 1578 in
>
> It looks like VecGetArrayF90 is no longer allowed in callbacks, which is what
> seems to be happening here.
>
> Victor.
>
>
>> On Jan 6, 2019, at 5:05 PM, Smith, Barry F. via petsc-users
>> <[email protected]> wrote:
>>
>>
>> What is the error message, cut and paste the entire message?
>>
>> Barry
>>
>>
>>> On Jan 6, 2019, at 3:12 PM, Chang Liu via petsc-users
>>> <[email protected]> wrote:
>>>
>>> Hi All,
>>> Recently, when I am upgrading our code from 3.8 to 3.10, it always runs
>>> into error during VecGetArrayF90 call (it is Fortran90-based code). The
>>> reason we use is to access the array for our user-defined matrix-vector
>>> multiplication subroutine, for example:
>>>
>>> subroutine mymult(A,x,y,loco_ierr)
>>> !!!!!!!!!!!!!!! matrix-vector multiplication y=A.x
>>> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>>> use mat_vec_mult,only:matvec
>>> implicit none
>>> Mat,intent(in)::A ! required by PETSc
>>> Vec,intent(in)::x
>>> Vec,intent(out)::y
This is wrong. y is not returned from your subroutine, it is passed into the
subroutine and hence is intent(in).
Hopefully this resolves your problem, otherwise let us know.
Barry
>>> PetscErrorCode,intent(out)::loco_ierr
>>> PetscScalar,pointer::xx(:),yy(:)
>>>
>>> call VecGetArrayReadF90(x,xx,loco_ierr)
>>> call VecGetArrayF90(y,yy,loco_ierr)
>>> call matvec(xx,yy)
>>> call VecRestoreArrayReadF90(x,xx,loco_ierr)
>>> call VecRestoreArrayF90(y,yy,loco_ierr)
>>> return
>>> end subroutine mymult
>>>
>>> I checked the change log on the website and saw a statement:
>>> TAO:
>>>
>>> • Added VecLock{Push|Pop} calls around user callbacks; use of VecGetArray
>>> in user callbacks is now prohibited.
>>> Is there any relation to my issue? All the online PETSc examples and
>>> description for VecGetArray/VecGetArrayF90 are the same as PETSc/3.8. I
>>> tried to add/use VecLockPop/Push, but still doesn't work.
>>>
>>> I am confused and not sure what is the problem?
>>> Could I get some help?
>>> Thanks,
>>> --
>>> Chang Liu
>>> PhD candidate
>>> Dept. of Electrical & Computer Engineering
>>> Ph: 765-7143357
>>> Email: [email protected]
>>
>
