Dear PETSc developers, I have FEM codes. It works very well in CPU computation. Now, I add '-vec_type seqcusp -mat_type aijcusp' when running the codes, I met the following errors. My question that whether there is an example to demonstrate how to revise the codes for the conversion from CPU to GPU. In addition, 'seqcusp' and 'seqaijcusp' are used when vec and mat are saved in one GPU card? Thank you very much. [0]PETSC ERROR: --------------------- Error Message ------------------------------------ [0]PETSC ERROR: Invalid argument! [0]PETSC ERROR: Vector type seqcusp does not have local representation! [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 3, Fri Sep 30 10:28:33 CDT 2011 [0]PETSC ERROR: See docs/changes/index.html for recent updates. [0]PETSC ERROR: See docs/faq.html for hints about trouble shooting. [0]PETSC ERROR: See docs/index.html for manual pages. [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: /work/01820/ylu/libmesh_svn01232012/examples/myproj_sp1/myproj-opt on a westmere- named c300-205.ls4.tacc.utexas.edu by ylu Wed Feb 8 14:34:46 2012 [0]PETSC ERROR: Libraries linked from /opt/apps/intel11_1/mvapich2_1_6/petsc/3.2/westmere-cuda/lib [0]PETSC ERROR: Configure run at Fri Dec 16 11:27:43 2011 [0]PETSC ERROR: Configure options --with-x=0 -with-pic --with-external-packages-dir=/var/tmp/petsc-3.2-buildroot//opt/apps/intel11_1/mvapich2_1_6/petsc/3.2/externalpackages-cuda --with-mpi-compilers=1 --with-mpi-dir=/opt/apps/intel11_1/mvapich2/1.6 --with-scalar-type=real --with-dynamic-loading=0 --with-shared-libraries=0 --with-chaco=1 --download-chaco=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/Chaco-2.2.tar.gz --with-spai=1 --download-spai=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/spai_3.0-mar-06.tar.gz --with-hypre=1 --download-hypre=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/hypre-2.6.0b.tar.gz --with-mumps=1 --download-mumps=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/MUMPS_4.9.2.tar.gz --with-scalapack=1 --download-scalapack=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/scalapack.tgz --with-blacs=1 --download-blacs=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/blacs-dev.tar.gz --with-spooles=1 --download-spooles=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/spooles-2.2-dec-2008.tar.gz --with-superlu=1 --download-superlu=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/SuperLU_4.1-December_20_2010.tar.gz --with-superlu_dist=1 --download-superlu_dist=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/SuperLU_DIST_2.5-December_21_2010.tar.gz --with-parmetis=1 --download-parmetis=/home1/0000/build/rpms/SOURCES/petsc-externalpackages/ParMetis-dev-p3.tar.gz --with-debugging=no --with-blas-lapack-dir=/opt/apps/intel/11.1/mkl/lib/em64t --with-mpiexec=mpirun_rsh --with-cuda=1 --with-cuda-dir=/opt/apps/cuda/4.0/cuda/ --with-cusp-dir=/opt/apps/cuda/4.0/cuda/ --with-thrust-dir=/opt/apps/cuda/4.0/cuda/ --COPTFLAGS=-xW --CXXOPTFLAGS=-xW --FOPTFLAGS=-xW [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: VecGhostGetLocalForm() line 82 in src/vec/vec/impls/mpi/commonmpvec.c [0]PETSC ERROR: zero() line 974 in "unknowndirectory/"/work/01820/ylu/libmesh_svn01232012/include/numerics/petsc_vector.h application called MPI_Abort(comm=0x84000002, 62) - process 0 Best, Yujie