Hi, I having problem to start oid. Our infrastructure is we have load balance and use cluster. Oid and db have HW load balance. Both are active active. When i tns ping from oid to db i got this kind of error. Code (Text): sgslufread: Hard error on read, OS error = 104 But when i tnsping from db1 to db2 it can resolve. So, what actual problem exactly? I'm blurr right now. Please shed me. MzarM.