The trading system is operating flawlessly and all of the necessary permits have been obtained, but market players using the system need more time to practice making trades, Iványi said. Errors made by traders when the exchange goes online will be sanctioned, she added. HUPX will announce the launch date a week ahead, Iványi said. About 15 market players are using the exchange in the test phase, started on June 18, twice as many as expected, HUPX CEO Zoltán Medveczki told MTI. HUPX was established by transmission system operator MAVIR in May 2007. (MTI-Econews)