ORA-01531
ORACLE Data Base MessagesDownload this dictionary
ORA-01531
ORA-01531: a database already open by the instance

Oracle8 Server Error MessagesDownload this dictionary
ORA-01531
a database already open by the instance
Section: 01500-01699 Oracle Commands Messages
Notes: This section lists messages generated when entering Oracle commands.If you are using Trusted Oracle, see the Trusted Oracle documentation for information about error messages in that environment.

Cause: During an ALTER DATABASE, an attempt was made to open a database by an instance for which there was already an open database.

Action: To open a new database, shut down the instance, then start up the instance and try the operation again.


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Oracle Error Messages - Description, Cause and ActionDownload this dictionary
ORA-01531
01531, 00000, "a database already open by the instance"
*Cause: During ALTER DATABASE, an attempt was made to open
a database on an instance for which there is already
an open database.
*Action: If you wish to open a new database on the instance, first
shutdown the instance and then startup the instance and
retry the operation.