Understanding SQL*Net
SQL*Net OPEN API Errors
This section lists the error numbers which can be returned if one of the above function calls fails. Note that in some cases, connection-related errors may come back from a send or receive call, if the connection has not yet been established at that time.
20002 - SDFAIL_TNSAPIE - The underlying "send" command failed in tnssend().
20003 - RECVFAIL_TNSAPIE - The underlying "receive" command failed in tnsrecv().
20004 - INVSVROP_TNSAPIE - Operation is invalid as the server.
20005 - INVCLIOP_TNSAPIE - Operation is invalid as the client.
20006 - HDLUNINI_TNSAPIE - The connection should be initialized by calling tnsopen().
20007 - INHFAIL_TNSAPIE - Server failed in inheriting the connection from the listener.
20008 - ACPTFAIL_TNSAPIE - Server failed in accepting the connection request from the client.
20009 - NULHDL_TNSAPIE - A null handle was passed into the call, which is not allowed.
20010 - INVOP_TNSAPIE - An invalid operation called was passed into the call.
20011 - MALFAIL_TNSAPIE - A malloc failed in TNS API call.
20012 - NLINIFAIL_TNSAPIE - Failed in NL initialization.
20013 - NMTOOLONG_TNSAPIE - Service name is too long.
20014 - CONFAIL_TNSAPIE - Client connect request failed.
20015 - LSNFAIL_TNSAPIE - Server failed to listen for connect request.
20016 - ANSFAIL_TNSAPIE - Server failed to answer connect request.
20017 - NMRESFAIL_TNSAPIE - Failed to resolve service name.
20020 - TNSAPIE_ERROR - TNS error occurred.