<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Jan 16, 2018 at 1:26 PM, El Haddad, Fadi <span dir="ltr"><<a href="mailto:f.el-haddad@imperial.ac.uk" target="_blank">f.el-haddad@imperial.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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Hello Petsc Users,</div>
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I am trying to set up a snes matrix free solver into an existing code.</div>
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I obtained the following log error by petsc :</div></div></div></blockquote><div><br></div><div>Setting it up is a little tricky, Why not just omit SNESSetJacobian() and it will automatically set it up?</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div id="gmail-m_-7137893733482512022divtagdefaultwrapper" dir="ltr" style="font-size:12pt;color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols">
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<div><span style="color:rgb(255,0,0)">[0]PETSC ERROR: --------------------- Error Message ------------------------------<wbr>------------------------------<wbr>--</span><br>
[0]PETSC ERROR: No support for this operation for this object type<br>
[0]PETSC ERROR: Mat type mffd<br>
[0]PETSC ERROR: See <a href="http://www.mcs.anl.gov/petsc/documentation/faq.html" target="_blank">http://www.mcs.anl.gov/petsc/<wbr>documentation/faq.html</a> for trouble shooting.<br>
[0]PETSC ERROR: Petsc Development GIT revision: unknown GIT Date: unknown<br>
[0]PETSC ERROR: ../Forse/JM62-FORSE/petsc-<wbr>infconv/forse on a arch-linux2-c-debug named me-felhadda by felhadda Tue Jan 16 12:49:53 2018<br>
[0]PETSC ERROR: Configure options --with-cc=mpicc --with-cxx=mpic++ --with-fc=mpif90 --with-mpi-dir=/usr/lib/mpich --download-fblaslapack<br>
[0]PETSC ERROR: #1 MatZeroEntries() line 5617 in /opt/petsc/petsc-infconv/src/<wbr>mat/interface/matrix.c<br>
[0]PETSC ERROR: #2 SNESComputeJacobianDefault() line 64 in /opt/petsc/petsc-infconv/src/<wbr>snes/interface/snesj.c<br>
[0]PETSC ERROR: #3 oursnesjacobian() line 97 in /opt/petsc/petsc-infconv/src/<wbr>snes/interface/ftn-custom/<wbr>zsnesf.c<br>
[0]PETSC ERROR: #4 SNESComputeJacobian() line 2374 in /opt/petsc/petsc-infconv/src/<wbr>snes/interface/snes.c<br>
[0]PETSC ERROR: #5 SNESSolve_NEWTONLS() line 222 in /opt/petsc/petsc-infconv/src/<wbr>snes/impls/ls/ls.c<br>
[0]PETSC ERROR: #6 SNESSolve() line 4179 in /opt/petsc/petsc-infconv/src/<wbr>snes/interface/snes.c<br>
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<div>Have anyone dealt with a similar error? I copied my snes matrix free set up here below :
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external :: FormFunction<br>
external :: MySNESConverged<br>
<br>
<br>
call PetscInitialize(PETSC_NULL_<wbr>CHARACTER,ierr)<br>
if (ierr .ne. 0) then<br>
print*,'Unable to initialize PETSc'<br>
stop<br>
endif<br>
call MPI_Comm_size(PETSC_COMM_SELF,<wbr>size,ierr)<br>
call MPI_Comm_rank(PETSC_COMM_SELF,<wbr>rank,ierr)<br>
<br>
<br>
call VecCreateSeq(PETSC_COMM_SELF,<wbr>n,x,ierr)<br>
call VecCreateSeq(PETSC_COMM_SELF,<wbr>n,r,ierr)<br>
<br>
call SNESCreate(PETSC_COMM_SELF,<wbr>snes,ierr)<br>
call SNESSetApplicationContext(<wbr>snes,userCtxptrs,ierr);<wbr>CHKERRA(ierr)<br>
<br>
call SNESSetFunction(snes,r,<wbr>FormFunction,userCtxptrs,ierr)<wbr>;CHKERRA(ierr)<br>
call MatCreateSnesMF(snes,JMF,ierr) <br>
call MatMFFDWPSetComputeNormU(JMF,<wbr>PETSC_FALSE,ierr)<br>
<br>
call SNESSetJacobian(snes,Jmf,Jmf,<wbr>SNESComputeJacobianDefault,<wbr>userCtxptrs,ierr)<br>
<div> call SNESSetUseMatrixFree(self%<wbr>snes,PETSC_TRUE,PETSC_TRUE,<wbr>ierr)<br>
</div>
call SNESSetConvergenceTest(snes,<wbr>MySNESConverged,userCtxptrs,<wbr>PETSC_NULL_FUNCTION,ierr)<br>
<br>
call SNESSetConvergedReason(snes,2,<wbr>ierr)<br>
call SNESSetNormSchedule(snes,SNES_<wbr>NORM_ALWAYS,ierr)<br>
<br>
call SnesSetTolerances(snes,1.d-8,<wbr>1.d-7,1.d-7,10,25,ierr)<br>
call SNESSetFromOptions(snes,ierr);<wbr>CHKERRA(ierr)<br>
call SNESView(snes,PETSC_VIEWER_<wbr>STDOUT_SELF,ierr)<br>
<br>
call getpointersUserCtx(ds,pt,<wbr>TypeY,TypeF,userCtxptrs)<br>
call FormInitialGuess(x,pt)<br>
<br>
call SNESsolve(snes,PETSC_NULL_VEC,<wbr>x,ierr)<br>
<br>
call SNESGetConvergedReason(snes,<wbr>reason,ierr)<br>
IF (reason .eq. 2 ) then <br>
call VecGetArrayReadF90(x,xx,ierr)<br>
pt%Y = xx<br>
call VecRestoreArrayReadF90(x,xx,<wbr>ierr)<br>
ConvFlag = True<br>
ELSE<br>
ConvFlag = False<br>
ENDIF</div>
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<div>Am I missing a crucial subroutine call? <br>
</div>
<div>Thank you for the help<span class="gmail-HOEnZb"><font color="#888888"><br>
</font></span></div><span class="gmail-HOEnZb"><font color="#888888">
<br>
Fadi<br>
</font></span></div>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="http://www.caam.rice.edu/~mk51/" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div>
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