Hi Christoph, Please report on https://github.com/vincent-hugot/iTeML/issues ! Right now there is no shrinking on exceptions but it should be possible (and reasonable) indeed. -- Simon Cruanes http://weusepgp.info/ key 49AA62B6, fingerprint 949F EB87 8F06 59C6 D7D3 7D8D 4AC0 1D08 49AA 62B6