Just merged the latest bug fixes from the 1.4.x tree with the 1.5.x tree. Torsten, If you're still having core dumps, try the latest build. I have the new C++Builder 5.x that comes with a memory checker / profiler and it found some things that may only show up in strange circumstances. Yeshiah, There is a BCB 5.0 project file to build the windows frontend. Hope this gets you going.