I am writing to you in order to inform you about an unusual behavior that pardiso solver exhibit in the latest version of mkl library. More specifically, we use this solver in our finite element code in order to solve the linear system of equations. Up to version ..., we could solve systems that arise when periodic boundary conditions are imposed. Unfortunately, the latest version can not solve them and a NAN appears during back- substitution. We have used both intel and gnu compilers as well as multithreaded and sequential versions without any improvement. Finally, these can be solved with WATSON and HSL solvers.
I am looking forward for your response.
- Dimitrios Fraggedakis