TNS-02507: Encryption: algorithm not installed
Cause: After picking an algorithm, the server was unable to find an index for it in its table of algorithms. This should be impossible because the algorithm was chosen (indirectly) from that list. This message is not normally visible to the user.
Action: For further details, turn on tracing and re-execute the operation. If the error persists, contact Oracle Support Services.
TNS-02506: Authentication: no type string
Cause: An authentication context structure does not contain a string that describes the authentication service being used.
Action: If it is possible, enable tracing and attempt to reproduce the problem. In any event, contact Oracle Support Services.
TNS-02505: Authentication: null context pointer provided
Cause: The function NAU_INI() was passed a null pointer as the pointer to the context that it is supposed to use.
Action: Call NAU_INI() with a pointer to a context structure.
TNS-02504: Parameter count retrieval failed
Cause: The native service layer was unable to determine the number of arguments given for a configuration parameter.
Action: If it is possible, enable tracing and attempt to reproduce the problem. In any event, contact Oracle Support Services.
TNS-02503: Parameter retrieval failed
Cause: The native service layer was unable to retrieve a parameter from a configuration file.
Action: If it is possible, enable tracing and attempt to reproduce the problem. In any event, contact Oracle Support Services.
TNS-02502: Authentication: unable to find initialization function
Cause: The native authentication service was unable to call the initialization function for the specified service because it does not exist.
Action: If this service adaptor came directly from Oracle, contact Oracle Support Services, as this error should never happen. Otherwise, add an initialization function for the service being used.
TNS-02501: Authentication: no more roles
Cause: When a process attempted to retrieve a role from the authentication service, no more were available.
Action: No action required. This error is used internally and occurs in the normal course of events.
TNS-02405: GMS call failed, check GMS logs
Cause: A GMS call made by the listener failed.
Action: Check if the GMS is up and running. See GMS-client trace files for more information.
TNS-02404: Service string contains no local handlers
Cause: The listener found no suitable handler to redirect to.
Action: Make sure that there is at least one handler for this node.
TNS-02403: Bad alias string or alias not present in tnsnames.ora
Cause: An alias was expected in TNSNAMES.ORA but was not found or was not correctly formed.
Action: Check the TNSNAMES.ORA for the alias and make sure it is correctly formed.