Oracle Message ORA-12560 - TNS: protocol adapter error

ERRORTNS: protocol adapter error
CAUSEA generic protocol adapter error occurred.
ACTIONCheck addresses used for proper protocol specification. Before reporting this error, look at the error stack and check for lower level transport errors. For further details, turn on tracing and reexecute the operation. Turn off tracing when the operation is complete.

441518ORA-12560 composite SAP Note
725251Known problems in patch level 122 of BR*Tools 6.20