Dear deal.II community,
I am new to deal.II and I had posted a question about
this same issue yesterday. Perhaps I did not ask it correctly. I have been
trying to simulate the wave equation on a particular kind of surface (I
have attached a picture of that surface and the mesh). I created the mesh
for that surface using gmsh. I was able to simulate the wave equation from
step-23 on that surface and I am currently working to change the initial
excitation, density, and tension. I also want to get the eigenfrequencies
for this surface and as a start, I just wanted to learn how deal.II solves
eigenspectrum using PETSc and SlEPc from step-36. But, when I try to run
that tutorial as is it shows the error I have posted below. I thought the
problem was not having the PETSc and SlEPc libraries so I went ahead and
installed them but that still does not resolve the issue. Please let me
know if you have run into this issue before and what you did to solve it.
Thank you!
THE ERROR message:
*[0]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------*
[0]PETSC ERROR: Error in external library
[0]PETSC ERROR: Error in LAPACK subroutine steqr: info=0
[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
trouble shooting.
[0]PETSC ERROR: Petsc Release Version 3.10.0, Sep, 12, 2018
[0]PETSC ERROR: ./step-36 on a named Pragalvs-MacBook-Air.local by
pragalvkarki Tue Sep 10 15:29:22 2019
(Lot of unnecessary stuff (I think ) in between these error messages)
An error occurred in line <182> of file
</Applications/deal.II.app/Contents/Resources/spack/src/dealii-v9.1.1/source/lac/slepc_solver.cc>
in function
void dealii::SLEPcWrappers::SolverBase::solve(const unsigned int,
unsigned int *)
The violated condition was:
ierr == 0
Additional information:
An error with error number 76 occurred while calling a SLEPc
function
Thank you for your time,
Pragalv
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