ORA-24005: must use DBMS_AQADM.DROP_QUEUE_TABLE to drop queue tables

I was getting this error while running the RMAN duplicate database in 11g. As I was duplicating only selected tablespaces over, oracle internally was trying to drop the unnecesary tablespaces and the whole duplicate process was failing with as below:

 sql statement: drop tablespace  "TEST1" including contents cascade constraints
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 11/26/2013 13:06:34
RMAN-03015: error occurred in stored script Memory Script
RMAN-03009: failure of sql command on clone_default channel at 11/26/2013 13:06:34
RMAN-11003: failure during parse/execution of SQL statement: drop tablespace  "TEST1" including contents cascade constraints
ORA-00604: error occurred at recursive SQL level 1
ORA-24005: must use DBMS_AQADM.DROP_QUEUE_TABLE to drop queue tables

RMAN> **end-of-file**


I was trying manually to drop the tablespace and I was getting the same error, but no queue tables whatsoever reside in this tablespace:

SQL> drop tablespace  "TEST1" including contents cascade constraints;
drop tablespace  "TEST1" including contents cascade constraints
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-24005: must use DBMS_AQADM.DROP_QUEUE_TABLE to drop queue tables



SQL> select * from dba_queue_tables where table_name in
         (select segment_name from dba_segments where tablespace_name='TEST1';

no rows selected

 At this point, my goal was to find out which statement is failing exactly.

 Solution:

SQL> ALTER system SET EVENTS='24005 TRACE NAME ERRORSTACK FOREVER, LEVEL 1';

System altered.


I then checked the alert log file for ORA-24005 and then inside the trace file I've found the exact statement failing:


ORA-24005: must use DBMS_AQADM.DROP_QUEUE_TABLE to drop queue tables
----- Current SQL Statement for this session (sql_id=0000000000000) -----
drop table "florin"."DDD#DEF$_AQERROR" cascade constraints purge

 In conclusion, oracle treats a table name with special characters as a queue table.
 I was able to drop this table, using DBMS_AQADM.DROP_QUEUE_TABLE, indeed, and then I've dropped the tablespace without any issue.