Oracle Error Message
ORA-39315: Cannot drop the first data file from a permanent or undo tablespace.
Reason for the Error
DBMS_METADATA_DIFF was comparing two permanent or undo tablespaces. The first data file in the first tablespace is missing from the second tablespace. There is no SQL ALTER statement to drop the first data file from a permanent or undo tablespace.
Solution
The difference cannot be eliminated with an SQL ALTER statement.
