[petsc-users] Index set does not match blocks

[Rongliang Chen]

Hello everyone,


I updated my code from petsc-3.6 to petsc-3.8 and got the following 
error. But it works well if I set the block size to be 1. I am solving 
an unstructured mesh problem. Any suggestions for debugging this are 
welcome. Thanks.


Best,

Rongliang


[0]PETSC ERROR: --------------------- Error Message 
--------------------------------------------------------------
[0]PETSC ERROR: Nonconforming object sizes
[0]PETSC ERROR: Index set does not match blocks
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html 
for trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.8.4, Mar, 24, 2018
[0]PETSC ERROR: ./HiBflow on a 64bit-debug named rongliang-chen by 
rlchen Sat Apr  7 13:14:20 2018
[0]PETSC ERROR: Configure options --download-mpich --download-blacs 
--download-scalapack --download-metis --download-parmetis 
--download-exodusii --download-netcdf --download-hdf5 --with-debugging=1 
--download-fblaslapack --download-ctetgen --with-64-bit-indices
[0]PETSC ERROR: #1 MatCreateSubMatrix_SeqBAIJ() line 184 in 
/home/rlchen/soft/petsc-3.8.4/src/mat/impls/baij/seq/baij2.c
[0]PETSC ERROR: #2 MatCreateSubMatrices_SeqBAIJ() line 264 in 
/home/rlchen/soft/petsc-3.8.4/src/mat/impls/baij/seq/baij2.c
[0]PETSC ERROR: #3 MatCreateSubMatrices() line 6764 in 
/home/rlchen/soft/petsc-3.8.4/src/mat/interface/matrix.c
[0]PETSC ERROR: #4 PCSetUp_ASM() line 326 in 
/home/rlchen/soft/petsc-3.8.4/src/ksp/pc/impls/asm/asm.c
[0]PETSC ERROR: #5 PCSetUp() line 924 in 
/home/rlchen/soft/petsc-3.8.4/src/ksp/pc/interface/precon.c
[0]PETSC ERROR: #6 KSPSetUp() line 381 in 
/home/rlchen/soft/petsc-3.8.4/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: #7 KSPSolve() line 612 in 
/home/rlchen/soft/petsc-3.8.4/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: #8 SNESSolve_NEWTONLS() line 224 in 
/home/rlchen/soft/petsc-3.8.4/src/snes/impls/ls/ls.c
[0]PETSC ERROR: #9 SNESSolve() line 4131 in 
/home/rlchen/soft/petsc-3.8.4/src/snes/interface/snes.c
[0]PETSC ERROR: #10 TimeStep() line 1751 in 
/home/rlchen/soft/3D_fluid/3DBloodFlow/Cerebral/Twolevel-3.8/HiBflow.c
[0]PETSC ERROR: #11 SolveTimeDependent() line 1315 in 
/home/rlchen/soft/3D_fluid/3DBloodFlow/Cerebral/Twolevel-3.8/HiBflow.c
[0]PETSC ERROR: #12 JoabCtxSolve() line 263 in 
/home/rlchen/soft/3D_fluid/3DBloodFlow/Cerebral/Twolevel-3.8/HiBflow.c
[0]PETSC ERROR: #13 main() line 158 in 
/home/rlchen/soft/3D_fluid/3DBloodFlow/Cerebral/Twolevel-3.8/HiBflow.c