Oracle Error - "ORA-01762: vopdrv: view query block not in FROM"

Came across this error "ORA-01762: vopdrv: view query block not in FROM"

Here is the version and platform details:

SQL> select banner from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production
PL/SQL Release 11.1.0.6.0 - Production
CORE 11.1.0.6.0 Production
TNS for 32-bit Windows: Version 11.1.0.6.0 - Production
NLSRTL Version 11.1.0.6.0 - Production

Here is the structure of the view:

SQL> DESC DBA_AUTOTASK_WINDOW_CLIENTS;
Name Null? Type
----------------------- -------- ----------------
WINDOW_NAME NOT NULL VARCHAR2(30)
WINDOW_NEXT_TIME TIMESTAMP(6) WITH TIME ZONE
WINDOW_ACTIVE VARCHAR2(5)
AUTOTASK_STATUS VARCHAR2(8)
OPTIMIZER_STATS VARCHAR2(8)
SEGMENT_ADVISOR VARCHAR2(8)
SQL_TUNE_ADVISOR VARCHAR2(8)
HEALTH_MONITOR VARCHAR2(8)

This query works:

SQL> SELECT * FROM DBA_AUTOTASK_WINDOW_CLIENTS

WINDOW_NAME WINDOW_NEXT_TIME WINDO AUTOTASK OPTIMIZE SEGMENT_ SQL_TUNE HEALTH_M
---------------- ---------------------------------------- ----- -------- -------- -------- -------- --------
MONDAY_WINDOW 03-AUG-09 10.00.00.000000 PM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED
TUESDAY_WINDOW 04-AUG-09 10.00.00.000000 PM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED
WEDNESDAY_WINDOW 05-AUG-09 10.00.00.000000 PM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED
THURSDAY_WINDOW 06-AUG-09 10.00.00.000000 PM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED
FRIDAY_WINDOW 31-JUL-09 10.00.00.000000 PM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED
SATURDAY_WINDOW 01-AUG-09 06.00.00.000000 AM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED
SUNDAY_WINDOW 02-AUG-09 06.00.00.000000 AM US/EASTERN FALSE ENABLED ENABLED ENABLED ENABLED DISABLED

7 rows selected.

But this one fails (or sucks! for the USA readers!):

SQL> SELECT WINDOW_NAME FROM DBA_AUTOTASK_WINDOW_CLIENTS;
SELECT WINDOW_NAME FROM DBA_AUTOTASK_WINDOW_CLIENTS
*
ERROR at line 1:
ORA-01762: vopdrv: view query block not in FROM

Any clue?