ORA-12558:TNS:protocol adapter not loaded 12-8 Oracle Database ErrorMessages Cause: Onsome platforms (such as OS/2) protocol adapters are loaded at
run-time. If the shared library (or DLL) for the protocol adapter has not been
loaded, then this error is returned. Action: Forfurther details, turn on tracing and reexecute the operation. The trace
file will have the name of the shared library (or DLL) that has not beenloaded.