Following the discussion in #1225 (closed), Matlab R2017a seems to require a change in mex-file compilation. This also implies that the commit https://github.com/DynareTeam/dynare/commit/4f3b35acbaaa23ad81d5200f68eacbbd9c9b98b6 is not correct, because we need a different set of 64bit mex-files going forward, starting with version 9.2.