ORA-01581

Error: ORA-01581: attempt to use rollback segment (string) new extent (string) which is being allocated

Causa: Undo generated to extend a rollback segment has run out of current undo block space. Oracle is attempting to write into the new extent which has not been completely allocated.

Acción: The rollback segment extending will be rolled back by the system, no more extension will be possible until the next extent is freed up by rolling back or committing other transactions.