Hi, I build a finite element system and the related PETSc codes are following,
KSPSetOperators(ksp,sparseMechanicalStiffnessMatrix,sparseMechanicalStiffnessMatrix,DIFFERENT_NONZERO_PATTERN); KSPSetTolerances(ksp,0.001,1.e-50,PETSC_DEFAULT, PETSC_DEFAULT); I output the solution and find its magnitude is about 1.0e+10. It's definitely wrong. The correct solution should be around 1 or 2. It seems the solver cannot converge. How do deal with this issue? Thanks. Yixun
