We have 3 databases (Oracle 7.3.4) on a DIGITAL ALPHA machine with Open Vms 7.1 The problem is : We have a Tns 12203 error when the total of connections to the 3 databases is bigger than 90. We have this error in all databases.When this error appears, we can only connect to databases without sqlnet utility. I have changed my listener.ora to set the parameter QUEUESIZE=200 but this parameter changed nothing. I have changed the parameter DECLARED OBJECTS = 1000 in the UCX program(TCPIP), but we have always the problem. I think there is a parameter to change on Tcpip connections but I don't know TCPIP. Or perhaps on SQLNET. Any Idea? Thanks a lot.