[petsc-users] Help letter from PETSc3.6 user

[Satish Balay]

Try: https://petsc.org/release/faq/#when-should-can-i-use-the-configure-option-with-64-bit-indices

Also best to use the current release 3.16

Satish

On Thu, 13 Jan 2022, 佟莹 wrote:

> Dear PETSc developers：
> Recently the following problem appeared in my code:
> 
> 
> [0]PETSC ERROR: --------------------- Error Message --------------------------------------------------------------
> [0]PETSC ERROR: Overflow in integer operation: http://www.mcs.anl.gov/petsc/documentation/faq.html#64-bit-indices
> [0]PETSC ERROR: Mesh of 513 by 513 by 19 (dof) is too large for 32 bit indices
> [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: runSimulation on a arch-linux2-c-opt named cn91 by hyper Thu Jan 13 10:21:05 2022
> [0]PETSC ERROR: Configure options prefix=/****/software/petsc/3.6.1-c-gcc4.9-mvapich2 --with-cc=mpicc --with-cxx=mpicxx --with-fc=mpif90 --with-mpiexec=yhrun --with-blas-lib=/****/software/lapack/3.8.0-gcc4.9/lib64/libblas.a --with-lapack-lib=/***/software/lapack/3.8.0-gcc4.9/lib64/liblapack.a --with-debugging=0 --with-shared-libraries
> [0]PETSC ERROR: #1 DMSetUp_DA_3D() line 211 in /****/project/petsc/petsc-3.6.1-gcc4.9.4-mvapich2/src/dm/impls/da/da3.c
> [0]PETSC ERROR: #2 DMSetUp_DA() line 27 in /****/project/petsc/petsc-3.6.1-gcc4.9.4-mvapich2/src/dm/impls/da/dareg.c
> [0]PETSC ERROR: #3 DMSetUp() line 569 in /****/project/petsc/petsc-3.6.1-gcc4.9.4-mvapich2/src/dm/interface/dm.c
> [0]PETSC ERROR: #4 DMDACreate3d() line 1441 in /****/project/petsc/petsc-3.6.1-gcc4.9.4-mvapich2/src/dm/impls/da/da3.c
> 
> 
> However, the troubleshooting website mentioned in the tip no longer exists. For this, I want your help. Hope you can tell me how can I troubleshoot the above. Looking forward to hearing from you.
> 
> 
> Sincerely,
> 
> 
> 
> PETSc user
> Ying Tong 
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> 佟莹
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> lshtongying at 163.com
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