ORA-29857: domain indexes and/or secondary objects exist in the tablespace

Database 11.2.0.4

I'm trying to drop a tablespace but it says domain indexes or secondary objects exist. But when I query for these, it shows none. What am I missing? How do I determine what is stopping me from dropping the tablespace?

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SQL>DROP TABLESPACE APPS_TS_TX_DATA INCLUDING CONTENTS;

DROP TABLESPACE APPS_TS_TX_DATA INCLUDING CONTENTS

*

ERROR at line 1:

ORA-29857: domain indexes and/or secondary objects exist in the tablespace

SQL>SELECT OWNER,INDEX_NAME, TABLE_OWNER, TABLE_NAME

 2 FROM DBA_INDEXES WHERE INDEX_TYPE='DOMAIN'

 3 AND TABLESPACE_NAME ='APPS_TS_TX_DATA';

no rows selected

SQL>SELECT INDEX_NAME,I.TABLE_NAME FROM DBA_INDEXES I, DBA_TABLES T