Engineering project designer Aveva's latest six months has seen trading slightly ahead of expectations helped by exchange rate movements and solid demand from its existing customers.Oil and Gas markets remain relatively robust, particularly in developing countries, such as Brazil, where large complex projects are stimulating demand. Power continues to offer opportunities, but the shipping side has seen few new sales.'There are some indications of stability returning across certain sectors and geographies but overall the Board continues to be cautious about the trading outlook into 2010,' the statement said. 'Aveva has made a solid start to the year,' chief executive Richard Longdon added.