[petsc-users] DMPlexCreateLocalVec Within a function

[Matthew Kury]

Yes you are correct I am sorry about that. I meant DMGetLocalVector, and the ilk. 

here is a dummy function I am working on to try to figure out what is going wrong:
  /////////////////////////////////////////////
  //    Get the information to operate on
  // Make Local Versions
  Vec             XLoc;
  DM              Xdm;
  PetscSection    XSec;
  PetscReal *XPoints=NULL;

  PetscErrorCode    ierr;


  ierr = DMGetLocalVector(msh.dm,&XLoc);chk;



  ierr = DMGetCoordinateDM(msh.dm,&Xdm);chk;
  ierr = DMGetCoordinatesLocal(msh.dm, &XLoc);chk;
  VecView(XLoc,pview);

  ierr = DMDAVecGetArrayRead(Xdm,XLoc,&XPoints);chk;

  ierr = DMDAVecRestoreArrayRead(Xdm,XLoc,&XPoints);chk;

  ierr = DMRestoreLocalVector(Xdm,&XLoc);chk;

//////////// end of function 

the error I get that seems to appear after the 2nd call or so is:
0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
[0]PETSC ERROR: Invalid argument
[0]PETSC ERROR: Wrong type of object: Parameter # 2
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.6.1, Jul, 22, 2015
[0]PETSC ERROR: ./net.out on a arch-darwin-c-debug named Matthews-MacBook-Pro-2.local by mkury Sat Apr 16 01:33:34 2016
[0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++ --with-fc=gfortran --download-fblaslapack --download-mpich --download-petsc4py --download-triangle --download-chaco --download-metis --download-parmetis --download-ctetgen
[0]PETSC ERROR: #2294 DMDAVecGetArrayRead() line 299 in /usr/local/petsc-3.6.1/src/dm/impls/da/dagetarray.c
[0]PETSC ERROR: #2295 Element_Investigation_TEST() line 248 in /Users/mkury/Documents/Code/petFEM/src/elementFunctions.c






thanks again, 

Matt
On Apr 16, 2016, at 1:21 AM, Jed Brown <jed at jedbrown.org> wrote:

> Matthew Kury <mkury at berkeley.edu> writes:
> 
>> Hello, 
>> 
>> 	I have done some reading and I have not been able to find out what the proper way to create and use vectors within a function.
>> 
>> 	If I have a function that passes in dm and V then: 
>> +++
>> 		DMPlexGetLocalVec(dm, &VLocal) ;
> 
> This function doesn't exist, and neither does DMPlexCreateLocalVec (from
> the subject of your email), but when I gaze into my crystal ball, it
> says you're probably spelling it DMGetLocalVector.  Please send the full
> error message.
> 
>> 		DMGlobalToLocalBegin(dm,V,INSERT_VALUES,VLocal); 
>> 		DMGlobalToLocalEnd(dm,V,INSERT_VALUES,VLocal) ;
>> 
>> 		VecGetArray(VLoc,VLocalArray);
>> 
>> 		“Stuff with VLocalArray”
>> 
>> 		VecRestoreArray(VLoc,VLocalArray);
>> 		
>> 		DMLocalToGlobalBegin(dm,VLocal,ADD_VALUES,V);
>> 		DMLocalToGlobalEnd(dm,VLocal,ADD_VALUES,V);
>> 
>> 		DMRestoreLocalVector(dm,&VLocal);
>> +++
>> 
>> 	The second time I call the function I get errors with the VecGetArray() function.  I would appreciate any advice as to what is going wrong. 
>> 
>> Thank you, 
>> 
>> Matthew

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20160416/b512802f/attachment.html>