ORA-28545
        A networking error occurred when connecting to an agent.
        
        
        Cause
        An attempt to call an external procedure or to issue SQL to a non-Oracle system on a Heterogeneous Services database link failed at connection initialization. The error diagnosed by the SQL*Net NCR layer was reported separately.
        Action
        Refer to the SQL*Net NCRO error message. If this is unclear, check the connection administrative setup in the Transparent Network Substrate (TNS) naming service and Listener configuration for the service associated with the Heterogeneous Services database link being used, or with 'extproc_connection_data' for an external procedure call.
        
     
    
    
        ORA-28545
        error diagnosed by Net8 when connecting to an agent
        
        
        Cause
        An attempt to call an external procedure or to issue SQL to a non-Oracle system on a Heterogeneous Services database link failed at connection initialization.  The error diagnosed by Net8 NCR software is reported separately.
        Action
        Refer to the Net8 NCRO error message.  If this isn't clear, check connection administrative setup in tnsnames.ora and listener.ora for the service associated with the Heterogeneous Services database link being used, or with 'extproc_connection_data' for an external procedure call.
        
     
    
    
        ORA-28545
        error diagnosed by Net8 when connecting to an agent
        
        
        Cause
        An attempt to call an external procedure or to issue SQL to a non-Oracle system on a Heterogeneous Services database link failed at connection initialization.  The error diagnosed by Net8 NCR software is reported separately.
        Action
        Refer to the Net8 NCRO error message.  If this isn't clear, check connection administrative setup in tnsnames.ora and listener.ora for the service associated with the Heterogeneous Services database link being used, or with 'extproc_connection_data' for an external procedure call.