Information management firm SDL reported growth in the first half but warned its customers were cautious due to the ongoing financial crisis.The firm said revenue had risen 20% to £133.6m as expected, with over the half the gain due to its purchase of marketing firm Alterian.Pre-tax profits were up 4% to £16.4m with earnings per ordinary share rising 2% to 15.63p.SDL said its services division grew 14% but its technology arm was flat."The global macro-economic outlook remains uncertain with the structural weakness in Europe remaining unresolved," said Executive Chairman Mark Lancaster."This in turn has created a degree of caution in some of the markets we operate in," he added. "Despite this we do see growth opportunities in both the USA and Asia."