HI, I HAD THIS PROBLEM TOO, I'M WORKING IN V.B. AND DB2 VER 8.1 WHEN I
STARTED A TRANSACCTION I RECIVED THE SAME ERR CODE, THE PROBLEM WAS
THAT I HAD A RECORSET OPEN(RESULSET IN JAVA), THE SOLUTION WAS, FIRST
CLOSE THE CONECCTION AND OPEN IT AGAIN BEFORE START THE TRANSACCTION,
I HOPE IT WORKS FOR YOU.