We are intermittently getting the error "Failed to connect to database. Network I/O Error" when opening an ArcSDE connection (9.3.1 client, 9.3.1 SDE, Oracle 11g) when using a 3-tier connection. When attempting to open a second time the connection works. We have turned on SDEVERBOSE and in the log from that we see: SDE_Oracle Error: 942 ORA-00942: table or view does not exist. Because it is intermittent ESRI support has not yet been able to identify the source of this problem. If anyone has a thought of what we should check for please let me know, thanks! Bob
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