Oracle Error ORA-01651: unable to extend save undo segment by string for tablespace string

Oracle Error Message

ORA-01651: unable to extend save undo segment by string for tablespace string

Reason for the Error

Failed to allocate an extent of the required number of blocks for saving undo entries for the indicated offline tablespace.

Solution

Check the storage parameters for the SYSTEM tablespace. The tablespace needs to be brought back online so the undo can be applied.