ORA-12950: SYSTEM tablespace specified as default permanent tablespace

Cause : SYSTEM tablespace was specified as the default permanent during database creation.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

If default permanent tablespace is not specified,then SYSTEM will implicitly become the default permanent tablespace. Specify an alternate tablespace or omit the default tablespace clause and reissue the CREATE DATABASE statement

update : 22-08-2017
ORA-12950

ORA-12950 - SYSTEM tablespace specified as default permanent tablespace
ORA-12950 - SYSTEM tablespace specified as default permanent tablespace

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