Oracle : Ошибка ORA-30334

"illegal dimension level name"
*Cause: A level name in a dimension ddl statement did not conform to
SQL identifier rules.

*Action: Use a level name that begins with a letter, consists of only
letters, digits, and underscores and contains no more than 30

Попробовать перевести

Поискать эту ошибку на форуме