Oracle Message TNS-00503 - Illegal ADDRESS parameters

ERRORIllegal ADDRESS parameters
CAUSEAn illegal set of protocol adapter parameters was specified.
ACTIONCheck the parameters within the ADDRESS section of the TNSNAMES.ORA file. It may be helpful to turn on tracing and look at the addresses specified in the trace file, checking for spelling or other errors. Be sure to turn tracing off when the trace is complete.