Oracle Error Message
ORA-33313: (DELDENT05) workspace object cannot be deleted because it is the target of an external partition of a partitioned variable.
Reason for the Error
User attempted to delete a variable, but some partitioned variable was defined to use that variable as the target of one of its external partitions.
Solution
DELETE the partitioned variable or CHGDFN DROP PARTITION the the external partition from the partitioned variable, then delete the target variable.