How to fix ORA-12560: TNS:protocol adapter error on Windows

(Doc ID 2313175.1)

Last updated on DECEMBER 14, 2017

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2 to 12.2]
Information in this document applies to any platform.


sqlplus / as sysdba (Bequeath) or connecting using other Non-sysdba users



Incomplete Upgrade or patching

Using Incorrect PATH / Environment Variables to startup the instance


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