When running SQL we sometimes get the error 25580 (system error occurred in the network function) and then error -349 (database not selected yet). Then we have to choose the database again. We are running HPUX 11.11 and Informix - SQL 7.31.FC1 on a 64-bit machine. This seems to happen more frequently during heavy use. Does anyone have any idea why this happens and what can be done to prevent it?