Hi,
i'm trying to use the sparse lu solver in a class that's part of a dll. Right after the successful initialization of the solver i test it with a random rhs vector and it works. But calling methods from outside the solver fails. Thanks for any suggestion what i might done wrong.

What do you mean by "calling methods from outside the solver"?

Hi,
thank you for your help,
my class looks like this:

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class myStuff
{
  void initSolver();
  void testSolver();
  SparseLU<SparseMatrix<double, ColMajor, int>, COLAMDOrdering<int>> m_solver;
}


the initSolver() method sets up the m_solver variable, i.e.

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void myStuff::initSolver()
{
  // for some matrix A SparseMatrix<double, ColMajor, int>
  A.makeCompressed();

  m_solver.isSymmetric(true);
  m_solver.analyzePattern(A);
  m_solver.factorize(A);

  testSolver(); // works
}


and calls testsolver. This is just solving for a constant vector. Then it works.
But if i try it outside, that is:

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  myStuff.testSolver();



it fails.
Thank you again for reading it.

m_solver keeps a const reference to the matrix A which must still be valid when calling testSolver.

hm, no that does not seems to the case, but you can still try to keep it as a member of your class for debugging purpose.

BTW, how does it fail?