ORA-01541: system tablespace cannot be brought offline; shut down if necessary
Cause: Tried to bring system tablespace offline
Action: Shutdown if necessary to do recovery
ORA-01542: tablespace ‘string’ is offline, cannot allocate space in it
Cause: Tried to allocate space in an offline tablespace
Action: Bring the tablespace online or create the object in other tablespace
ORA-01543: tablespace ‘string’ already exists
Cause: Tried to create a tablespace which already exists
Action: Use a different name for the new tablespace
ORA-01544: cannot drop system rollback segment
Cause: Tried to drop system rollback segment
ORA-01545: rollback segment ‘string’ specified not available
Cause: Either: 1) An attempt was made to bring a rollback segment online that is unavailable during startup; for example, the rollback segment is in an offline tablespace. 2) An attempt was made to bring a rollback segment online that is already online. This is because the rollback segment is specified twice in the ROLLBACK_SEGMENTS parameter in the initialization parameter file or the rollback segment is already online by another instance. 3) An attempt was made to drop a rollback segment that is currently online. 4) An attempt was made to alter a rollback segment that is currently online to use unlimited extents. 5) An attempt was made to online a rollback segment that is corrupted. This is because the rollback is specified in _corrupted_rollback_segments parameter in initialization parameter file.
Action: Either: 1) Make the rollback segment available; for example, bring an offline tablespace online. 2) Remove the name from the ROLLBACK_SEGMENTS parameter if the name is a duplicate or if another instance has already acquired the rollback segment. 3) Bring the rollback segment offline first. This may involve waiting for the active transactions to finish, or, if the rollback segment needs recovery, discover which errors are holding up the rolling back of the transactions and take appropriate actions. 4) Same as 3). 5) Remove the name from the _corrupted_rollback_segments parameter.
Above are list of Oracle Database Errors or Warnings from Error ORA-01541 to ORA-01545 received while performing certain operation against Oracle Database or related products.
What are Oracle Database Error Messages?
Oracle Error Messages may be returned while using products which are part of Oracle Database. Each Oracle Database Error or Warning Message mentioned above contains the Warning or Error Message Statement, a short explanation of the probable causes of the Error message, and a recommended action.
Hope this was helpful.
Information about Oracle Database Error Messages or Warning Messages on Windows and Linux Operating Systems.