Hi,
Sometimes You can get ” TNS-03506: Failed to create address binding ” error.
Details of error are as follows.
TNS-03506: Failed to create address binding
Cause: The TNSPING utility found the requested address or service name, but received an internal error when trying to use it.
Action: This is an internal error which should not normally be visible.
Ensure that memory is available to run the application and that there are no other
operating system problems, and then attempt the command again.
Recreate the tnsnames.ora file through the Oracle provided tool like NET Configuration Assistant or NET Manager.
Do you want to learn more details about RMAN, then read the following articles.
https://ittutorial.org/rman-backup-restore-and-recovery-tutorials-for-beginners-in-the-oracle-database/