Dear all, We have developed the codes with PETSc + SLEPc which works well on CPU version. Now we want to try these codes with GPU + MPI, but get some weird errors shown as below. I have found someone talked about this problem here http://lists.mcs.anl.gov/pipermail/petsc-dev/2016-March/018836.html , but I can hardly understand it. Can anyone help me with these issues? Thank you in advance! [0]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- [0]PETSC ERROR: Error in external library [0]PETSC ERROR: CUBLAS error 1 [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting. [0]PETSC ERROR: [2]PETSC ERROR: --------------------- Error Message -------------------------------------------------------------- [2]PETSC ERROR: Error in external library [2]PETSC ERROR: CUBLAS error 1 [2]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for trouble shooting. [2]PETSC ERROR: Petsc Development GIT revision: v3.7.6-3965-gf375733 GIT Date: 2017-05-28 10:32:02 -0500 [2]PETSC ERROR: ./hyperh on a arch-linux2-c-debug named romeo44 by xinzhewu Mon May 29 18:03:58 2017 [2]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++ --with-fc=gfortran --download-mpich --download-fblaslapack --with-visibility=0 --with-shared-libraries=0 --with-cuda=1 --with-thrust=1 --with-precision=double --with-clanguage=c --with-pestc-arch=linux-c-no-debug-complex --with-scalar-type=complex [2]PETSC ERROR: #1 PetscInitialize() line 906 in /home/xinzhewu/Petsc-GPUs/petsc/src/sys/objects/pinit.c [2]PETSC ERROR: #2 SlepcInitialize() line 259 in /home/xinzhewu/Petsc-GPUs/slepc/src/sys/slepcinit.c -- Xinzhe WU Ph.D Student of Computer Science Maison de la Simulation, CNRS USR3441 Building 565, CEA Saclay 91191, Gif-sur-Yvette, France Tel: +33 (0) 1 69 08 59 93