ParPre is a library of parallel preconditioners for iterative solution methods for linear systems of equations.
Development on ParPre has stopped; some of its functionality has been incorporated into recent versions of Petsc
Authors: Victor Eijkhout and Tony Chan.
ParPre is part of the ScaLaPack project.
ParPre uses the Petsc library. Make sure you are using the same versions of Petsc and ParPre. The current version of ParPre is 2.0.29.