ORA-01658: Unable to create INITIAL extent for segment in tablespace %s
** Solved ** You will encounter this error when a tablespace is full or cannot extend automatically. These are the possible solutions (if there are any other ways add a comment): Solution 1: Resize Tablespace alter database datafile ' ' resize M; Solution 2: Add Datafile alter tablespace tablespace_name add datafile ' ' size M autoextend M maxsize M|off>;