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Resolving the "ORA-12571: TNS:Packet writer failure" error

When I install Oracle9i in Windows 2000, the installation went OK. But when DBCA started to create database, the error message "ORA-12571: TNS:Packet writer failure" was produced. I can not have any database installed in my machine. I really do not know what is wrong. Your help will be greatly appreciated.

You may be experiencing an error shown in Note 112589.1 on Metalink. The suggestion is to modify the registry. Fire up REGEDIT and go to HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE. Then add EPC_DISABLED and set the value to TRUE.

Another thing you can try is to change your SQLNET.ORA file to have the following line:

SQLNET.AUTHENTICATION_SERVICES = (NONE) 
Give those two a try.

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